Jordan Spieth of the U.S. retrieves his ball from the Swilcan Burn on the first hole during a practice round ahead of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 15, 2015. REUTERS/Lee Smith 

Tennis - Great Britain v France - Davis Cup World Group Quarter Final - Queen's Club, London - 18/7/15Great Britain's Andy Murray slips during his doubles match Action Images via Reuters / Andrew Boyers 

Team Sky rider Chris Froome of Britain, race leader's yellow jersey, cycles in the downhill during the 195-km (121.16 miles) 12th stage of the 102nd Tour de France cycling race from Lannemezan to Plateau de Beille, in the French Pyrenees mountains, France, July 16, 2015. REUTERS/Stefano Rellandini 

Dustin Johnson of the U.S. hits his tee shot on the 16th hole during the second round of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 18, 2015. REUTERS/Eddie Keogh 

Real Madrid's Cristiano Ronaldo (2nd R) heads the ball during the International Champions Cup soccer match against AS Roma at the Melbourne Cricket Ground, Australia, July 18, 2015. REUTERS/David Gray 

Pakistan's Azhar Ali avoids a bouncer from Sri Lanka's Thisara Perera (not pictured) during their third One Day International cricket match in Colombo July 19, 2015. REUTERS/Dinuka Liyanawatte 

Italy's Arianna Errigo (L) celebrates the victory over team Russia, beside Russia's Larisa Korobeynikova, in their women's team foil final at the World Fencing Championships in Moscow, Russia, July 19, 2015. REUTERS/Grigory Dukor 

Tiger Woods of the U.S. stands on the driving range ahead of a practice round ahead of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 14, 2015. REUTERS/Lee Smith 

Urugay's Maximo Cancio (L) is blocked by Brazil's Vinicius Teixeira during their men's handball match at the 2015 Pan Am Games in Toronto, Ontario July 19, 2015. REUTERS/Chris Helgren 

Saskatchewan Roughriders running back Anthony Allen celebrates his touchdown while playing against the BC Lions during the second half of their CFL football game in Regina, Saskatchewan July 17, 2015. The Lions won the game 27-24. REUTERS/David Stobbe 

Cricket - England v Australia - Investec Ashes Test Series Second Test - Lord?s - 19/7/15Australia's Josh Hazlewood celebrates as Australia win the second testReuters / Philip Brown 

Zimbabwe bowler Taura Muzarabani (2nd R) is congratulated by team mates after getting the wicket of India's Sanju Samson during the second and last T20 cricket match in Harare July 19, 2015. REUTERS/Philimon Bulawayo 

South Africa's Springboks lock Eben Etzebeth scores a try as Australia's Wallabies Adam Ashley-Cooper attempts to tackle him during their Rugby Championship match in Brisbane, July 18, 2015. REUTERS/Jason Reed 

Cyclist Lance Armstrong of the U.S. is surrounded by journalists as he leaves his bus before taking part in Geoff Thomas's 'One Day Ahead' charity event during a stage of the 102nd Tour de France cycling race from Muret to Rodez, France, July 16, 2015. REUTERS/Fred Lancelot 

Canada's Tyrell Johnston is held by Dominican Republic's Dioris Mateo (R) during their men's handball match at the 2015 Pan Am Games in Toronto, Ontario July 19, 2015. REUTERS/Chris Helgren 

Paul Dunne of Ireland hits his tee shot on the 18th hole during the third round of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 19, 2015. REUTERS/Eddie Keogh 

Argentina's Carlos Berlocq celebrates after defeating Serbia's Viktor Troick and Nenad Zimonjic during their Davis Cup men's doubles quarter-final tennis match in Buenos Aires, July 18, 2015. REUTERS/Enrique Marcarian 

Italy's Andrea Baldini (2nd L) celebrates with team mates their victory over team Russia in the men's team foil final at the World Fencing Championships in Moscow, Russia, July 19, 2015. REUTERS/Grigory Dukor 

Genzebe Dibaba of Ethiopia celebrates her victory and a new world record in the 1500 meters women event at the IAAF Diamond League Herculis meeting at the Louis II Stadium in Monaco, July 17, 2015. REUTERS/Jean-Pierre Amet 

Cricket - Australia Nets - Lord?s - 14/7/15Australia's Steven Smith (L), Michael Clarke and Shane Watson (R) during a training session Action Images via Reuters / Philip Brown 

Javier Aquino (L) of mexico's Tigres is tackled by Rodrigo Dourado of Brazil's Internacional during the first leg of their Copa Libertadores semifinal soccer match in Porto Alegre, Brazil, July 15, 2015. REUTERS/Diego Vara 

Argentine soccer striker Carlos Tevez kisses the grass of the soccer field during his presentation as a new Boca Juniors player at La Bombonera stadium in Buenos Aires July 13, 2015. REUTERS/Marcos Brindicci 

Germany's WBO Super Middleweight World Champion Arthur Abraham (L) watches his challenger and compatriot Robert Stieglitz on the ground following his technical knock-out in their world championships fight in Halle Westfalen, western Germany, July 18, 2015. REUTERS/Wolfgang Rattay 

Team Sky rider Chris Froome of Britain, race leader's yellow jersey, celebrates as he crosses the finish line to win the 167-km (103.7 miles) 10th stage of the 102nd Tour de France cycling race from Tarbes to La Pierre-Saint -Martin, France, July 14, 2015. REUTERS/Eric Gaillard 

Paul Dunne of Ireland jumps to look at the 13th hole during the third round of the British Open golf championship on the Old Course in St. Andrews, Scotland, July 19, 2015. REUTERS/Lee Smith TPX IMAGES OF THE DAY 

Team Sky rider Chris Froome of Britain wears the race leader's yellow jersey as he cycles during the 178.5-km (110.9 miles) 14th stage of the 102nd Tour de France cycling race from Rodez to Mende, France, July 18, 2015. REUTERS/Stefano Rellandini TPX IMAGES OF THE DAY

Cricket - England v Australia - Investec Ashes Test Series Second Test - Lord?s - 19/7/15
Australia celebrate after winning the second test
Reuters / Philip Brown
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