Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson dons some boxing gloves for a 'sparring session' during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson enters the ring during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson puts on some boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson gestures with trainer Steve Egan, center, and Shaun Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson is reflected in a mirror as he is interviewed during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson poses for a photo wearing boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson works out with trainer Steve Egan during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Britain's Prime Minister Boris Johnson puts on some boxing gloves during a stop in his General Election Campaign trail at Jimmy Egan's Boxing Academy in Manchester, Britain November 19, 2019. Frank Augstein/Pool via REUTERS 

Nascar driver Jimmie Johnson poses for a photograph with an F1 car at the McLaren Technology Centre in Woking, Britain November 21, 2018. REUTERS/Will Russell 

U.S. golfers Jimmy Walker (L), Rickie Fowler (R) and Zach Johnson walk down the 6th fairway during practice for the 2018 Masters golf tournament at Augusta National Golf Club in Augusta, Georgia, U.S. April 2, 2018. REUTERS/Jonathan Ernst 

51st Country Music Association Awards – Arrivals - Nashville, Tennessee, U.S., 08/11/2017 - Jimmie Johnson and Chandra Janway. REUTERS/Harrison McClary 

51st Country Music Association Awards – Arrivals - Nashville, Tennessee, U.S., 08/11/2017 - Jimmie Johnson and Chandra Janway. REUTERS/Harrison McClary 

Britain Rugby Union - Bath Rugby v Wasps - Aviva Premiership - Recreation Ground - 4/3/17 Anthony Watson of Bath Rugby in action with Jimmy Gopperth and Ashley Johnson of Wasps Mandatory Credit: Action Images / Henry Browne Livepic EDITORIAL USE ONLY. 

Britain Rugby Union - Bath Rugby v Wasps - Aviva Premiership - Recreation Ground - 4/3/17 Anthony Watson of Bath Rugby in action with Jimmy Gopperth and Ashley Johnson of Wasps Mandatory Credit: Action Images / Henry Browne Livepic EDITORIAL USE ONLY. 

Jimmy Walker (L) of the U.S. poses for a photo with compatriots Rickie Fowler (Bottom L), Dustin Johnson (Top C), Phil Mickelson and coach Butch Harmon (2nd R) on the Swilcan Bridge on the 18th hole during a practice round ahead of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 14, 2015. REUTERS/Paul Childs 

The U.S. team line up for a photograph ahead of the 2014 Ryder Cup at Gleneagles in Scotland September 23, 2014. Back row (L-R) Hunter Mahan Jim Furyk, Keegan Bradley, Matt Kuchar, Jimmy Walker, Bubba Watson, Phil Mickelson and Webb Simpson. Front row (L-R) U.S. Ryder Cup player Patrick Reed, Zach Johnson, U.S. Ryder Cup captain Tom Watson, Jordan Speith and Rickie Fowler. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT GOLF)

The U.S. team line up for a photograph ahead of the 2014 Ryder Cup at Gleneagles in Scotland September 23, 2014. Back row (L-R) Hunter Mahan Jim Furyk, Keegan Bradley, Matt Kuchar, Jimmy Walker, Bubba Watson, Phil Mickelson and Webb Simpson. Front row (L-R) U.S. Ryder Cup player Patrick Reed, Zach Johnson, U.S. Ryder Cup captain Tom Watson, Jordan Speith and Rickie Fowler. REUTERS/Phil Noble (BRITAIN - Tags: SPORT GOLF)

U.S. President Barack Obama and NASCAR driver Jimmie Johnson hold the trophy as the rest of the Hendrick Motorsports team join them for a photo during an event honoring their 2013 NASCAR Sprint Cup Series championship at the White House in Washington June 25, 2014.

REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS SPORT MOTORSPORT) 

U.S. President Barack Obama (2nd R) poses with NASCAR champion Jimmie Johnson (R), Hendrick Motorsports team owner Rick Hendrick (L) and crew chief Chad Knaus (2nd L) in the East Room of the White House in Washington, June 25, 2014. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS SPORT MOTORSPORT) 

U.S. President Barack Obama poses with driver Jimmie Johnson and his Hendrick Motorsports team members to honor his 2013 NASCAR Sprint Cup Series championship while in the East Room of the White House in Washington, June 25, 2014. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS SPORT MOTORSPORT) 

U.S. President Barack Obama speaks during an event to honor NASCAR driver Jimmie Johnson's (R) 2013 NASCAR Sprint Cup Series championship at the White House in Washington June 25, 2014.

REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS SPORT MOTORSPORT) 

U.S. President Barack Obama and NASCAR driver Jimmie Johnson arrive at an event hosted by Obama to honor Johnson's 2013 NASCAR Sprint Cup Series championship at the White House in Washington June 25, 2014.

REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS SPORT MOTORSPORT) 

Andrew Young (L-R), former U.S. president Jimmy Carter, Lynda Bird Johnson, former U.S. President Bill Clinton, Oprah Winfrey, U.S. first lady Michelle Obama, Caroline Kennedy, and U.S. President Barack Obama attend ceremonies celebrating the 50th anniversary of the 1963 "March on Washington" at the Lincoln Memorial in Washington August 28, 2013. America is struggling to fully realize the vision that civil rights leader Martin Luther King described in his famous "I have a dream" speech 50 years ago, as the goal of economic security for all remains elusive, Obama said on Wednesday. REUTERS/Gary Cameron (UNITED STATES - Tags: ANNIVERSARY POLITICS) 

US Tobacco graders Jimmy Allen (third R) and Scott Harrington, discuss a tobacco grade with warehouse manager Elton Johnson (R) at the Big L Warehouse in Mullins, South Carolina July 29, 2013. The farm cooperative US Tobacco sets the standard for pricing and quality of the area farmer's crops at this warehouse. The traditional tobacco harvest requires many labor-intensive hours to bring the crop to market, especially with the flue-cured variety prominent in the southern United States. With the growing health concerns with smoking in the US, most farmers use market cooperatives to sell their crop to the growing markets in China. Picture taken on July 29, 2013. REUTERS/Randall Hill (UNITED STATES - Tags: BUSINESS SOCIETY AGRICULTURE) 

Brooklyn Nets' Joe Johnson (L) shoots over Chicago Bulls' Jimmy Butler during the first half of Game 3 of their NBA Eastern Conference Quarterfinals basketball playoff series in Chicago, Illinois April 25, 2013. REUTERS/Jim Young (UNITED STATES - Tags: SPORT BASKETBALL) 

Brooklyn Nets' guard Joe Johnson (7) drives in on Chicago Bulls' forward Jimmy Butler (R) in the second half of Game 1 of their NBA Eastern Conference Quarterfinals basketball playoff series in Brooklyn, New York April 20, 2013. REUTERS/Brendan McDermid (UNITED STATES - Tags: SPORT BASKETBALL) 

Jimmie Johnson (L) in his number 48 Chevrolet races against Brad Keselowski early in running of the 2012 Ford EcoBoost 400 Sprint Cup NASCAR race at the Homestead-Miami Speedway in Homestead, Florida November 18, 2012. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: SPORT MOTORSPORT) 

Members of the Fox NFL Sunday broadcast team appear during a presentation to announce Fox's new sports network "Fox Sports 1" in New York, March 5, 2013. Fox Sports 1 will begin broadcasting in August of 2013. From left to right are James Brown, Terry Bradshaw, Howie Long, Michael Strahan, Jimmy Johnson and game announcer Try Aikman. REUTERS/Mike Segar (UNITED STATES - Tags: ENTERTAINMENT SPORT BUSINESS MEDIA) 

Jimmie Johnson celebrates atop his number 48 Chevrolet after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Joe Skipper (UNITED STATES - Tags: SPORT MOTORSPORT) 

Jimmie Johnson poses next to the trophy after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Brian Blanco (UNITED STATES - Tags: SPORT MOTORSPORT) 

Jimmie Johnson celebrates atop his number 48 Chevrolet after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Joe Skipper (UNITED STATES - Tags: SPORT MOTORSPORT) 

Jimmie Johnson celebrates atop his number 48 Chevrolet after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Joe Skipper (UNITED STATES - Tags: SPORT MOTORSPORT) 

Driver Jimmie Johnson celebrates in victory lane with a bottle of champagne after winning the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Brian Blanco (UNITED STATES - Tags: SPORT MOTORSPORT) 

NASCAR driver Jimmie Johnson (2nd L) stands with owner Rick Hendrick (L), NFL player Ray Lewis (3rd L) and crew chief Chad Knaus (R) after Johnson won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Brian Blanco (UNITED STATES - Tags: SPORT MOTORSPORT) 

NASCAR driver Jimmie Johnson celebrates after winning the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Pierre Ducharme (UNITED STATES - Tags: SPORT MOTORSPORT) 

Fans celebrate with NASCAR driver Jimmie Johnson after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Pierre Ducharme (UNITED STATES - Tags: SPORT MOTORSPORT) 

The crew of Jimmie Johnson celebrates after he won the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Pierre Ducharme (UNITED STATES - Tags: SPORT MOTORSPORT) 

NASCAR driver Jimmie Johnson (R) brings his No. 48 Chevrolet to the finish line in first place ahead of Dale Earnhardt Jr. (L) during the NASCAR Sprint Cup Series Daytona 500 race at the Daytona International Speedway in Daytona Beach, Florida February 24, 2013. REUTERS/Brian Blanco (UNITED STATES - Tags: SPORT MOTORSPORT)