Manny Pacquiao of the Philippines hits undefeated WBO welterweight champion Timothy Bradley of the U.S. with a right during their title fight at the MGM Grand Garden Arena in Las Vegas, Nevada April 12, 2014. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING TPX IMAGES OF THE DAY) 

Manny Pacquiao (L) of the Philippines hits undefeated WBO welterweight champion Timothy Bradley of the U.S. during their title fight at the MGM Grand Garden Arena in Las Vegas, Nevada April 12, 2014. Pacquiao won by unanimous decision. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING TPX IMAGES OF THE DAY) 

Manny Pacquiao of the Philippines celebrates his unanimous decision victory over WBO welterweight champion Timothy Bradley of the U.S. during their title fight at the MGM Grand Garden Arena in Las Vegas, Nevada April 12, 2014. Bradley was previously undefeated. REUTERS/R. Marsh Starks (UNITED STATES - Tags: SPORT BOXING TPX IMAGES OF THE DAY) 

Mo Farah of Britain sprints down The Mall before finishing in eighth position in the men's Elite London Marathon April 13, 2014. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT ATHLETICS) 

Competitors race in coloured running shoes in the men's elite class runners during the London Marathon April 13, 2014. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT ATHLETICS) 

A competitor dressed as Freddie Mercury and carrying a vacuum cleaner runs for charity during the London Marathon April 13, 2014. REUTERS/Luke MacGregor (BRITAIN - Tags: SPORT TPX IMAGES OF THE DAY ATHLETICS) 

Jessie Vargas (L) of the U.S. hits Khabib Allakhverdiev of Russia with a left during their WBA interim super lightweight fight at the MGM Grand Garden Arena in Las Vegas, Nevada April 12, 2014. Vargas won by unanimous decision. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING TPX IMAGES OF THE DAY) 

U.S. golfer Bubba Watson hits his tee shot on the third hole during the final round of the Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 13, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: SPORT GOLF TPX IMAGES OF THE DAY)

U.S. golfer Bubba Watson reacts after winning the tournament with his caddy Ted Scott on the 18th green during the final round of the Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 13, 2014. REUTERS/Jim Young (UNITED STATES - Tags: SPORT GOLF)

Former Masters champions Jack Nicklaus (L) and Arnold Palmer, both of the U.S. fist bump as they take part in the ceremonial start of the Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 10, 2014. REUTERS/Mike Segar (UNITED STATES - Tags: SPORT GOLF)

U.S. golfer Jason Dufner hits a a shot on the eighth hole during the first round of the 2014 Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 10, 2014. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT GOLF)

Joost Luiten of the Netherlands hits from the sand trap on the seventh hole during the first round of the Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 10, 2014. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT GOLF)

Britain's Lee Westwood tees off on the 17th hole during the first round of the 2014 Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 10, 2014. REUTERS/Jim Young (UNITED STATES - Tags: SPORT GOLF)

Golfer Zach Johnson of the U.S. laughs while two of his children do push-ups during the Par 3 Contest ahead of the Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia April 9, 2014. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT GOLF)

Scarves are tied to a gate by the Hillsborough memorial ahead of the English Premier League soccer match between Liverpool and Manchester City at Anfield in Liverpool, northern England April 13, 2014. REUTERS/Nigel Roddis (BRITAIN - Tags: SPORT SOCCER) 

Hull City's fans watch their English FA Cup semi-final soccer match against Sheffield United at Wembley Stadium during a sunny day in London April 13, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY) 

AS Monaco's Anthony Martial challenges Stade Rennes' Cheikh M'Bengue (R) during their French Ligue 1 soccer match at the Route de Lorient stadium in Rennes, April 12, 2014. REUTERS/Stephane Mahe (FRANCE - Tags: SPORT SOCCER) 

Barcelona's Lionel Messi reacts as he lies on the pitch during their Spanish First Division soccer match against Granada at Nuevo Los Carmenes stadium in Granada, April 12, 2014. REUTERS/Marcelo del Pozo (SPAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY) 

Sporting's Jefferson Nascimento jumps for the ball with Gil Vicente's Jairo Mosquera during their Portuguese premier league soccer match at Alvalade stadium in Lisbon April 12, 2014. REUTERS/Rafael Marchante (PORTUGAL - Tags: SPORT SOCCER) 

Real Madrid's Isco (L) fights to head the ball with Almeria's Nelson Augusto Tomar Ramos during their Spanish first division soccer match at Santiago Bernabeu stadium in Madrid, April 12, 2014. REUTERS/Susana Vera (SPAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY) 

Gabriel Leyes (front) of Uruguay's Penarol is challenged by Richard Ruiz of Venezuela's Deportivo Anzoategui during their Copa Libertadores soccer match in Montevideo April 10, 2014. REUTERS/Andres Stapff (URUGUAY - Tags: SPORT SOCCER) 

Juan Ferreyra (C) of Brazil's Botafogo controls the ball next to teammate Marcelo Benitez under pressure from Santiago Gentiletti (L) of Argentina's San Lorenzo during their Copa Libertadores soccer match in Buenos Aires April 9, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: SPORT SOCCER) 

Juventus Claudio Marchisio (R) celebrates with teammate Arturo Vidal (L) after scoring against Olympique Lyon during the second leg of their Europa League quarter-final soccer match at the Olympic stadium in Turin April 10, 2014.
REUTERS/Giorgio Perottino (ITALY - Tags: SPORT SOCCER TPX IMAGES OF THE DAY) 

Julian Cardozo (L) of Argentina's Arsenal controls the ball against Walter Sandoval of Mexico's Santos Laguna during their Copa Libertadores soccer match in Buenos Aires April 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: SPORT SOCCER) 

Chelsea's John Terry reacts at the end of their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014. Chelsea won the match 2-0 and qualified for the next round. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT SOCCER)

Chelsea's Demba Ba scores the first goal for the team during their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT SOCCER)

Paris St Germain's Edinson Cavani reacts after missing a goal opportunity during his team's Champions League quarter-final second leg soccer match against Chelsea at Stamford Bridge in London, April 8, 2014. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Paris St Germain's goalkeeper Salvatore Sirigu (R) looks on as Chelsea's Andre Schuerrle (C) scores the first goal for the team during their Champions League quarter-final second leg soccer match against Paris St Germain at Stamford Bridge in London, April 8, 2014. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Paris St Germain's goalkeeper Salvatore Sirigu (L) saves a free kick from Chelsea's Frank Rampart (unseen) during their Champions League quarter-final second leg soccer match at Stamford Bridge in London, April 8, 2014. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Chelsea's Willian (L) challenges Paris St Germain's Ezequiel Lavezzi during their Champions League quarter-final second leg soccer match at Stamford Bridge in London, April 8, 2014. REUTERS/Stefan Wermuth (BRITAIN - Tags: SPORT SOCCER)

Chelsea's Samuel Eto'o (R) challenges Paris St Germain's Thiago Silva during their Champions League quarter-final second leg soccer match at Stamford Bridge in London, April 8, 2014. REUTERS/Dylan Martinez (BRITAIN - Tags: SPORT SOCCER)

Manchester United's goalkeeper David de Gea fails to save a goal by Bayern Munich's Mario Mandzukic during their Champions League quarter-final second leg soccer match in Munich, April 9, 2014. REUTERS/Kai Pfaffenbach (GERMANY - Tags: SPORT SOCCER)

Manchester United's Wayne Rooney goes for a header with Bayern Munich's Dante (R) during their Champions League quarter-final second leg soccer match in Munich, April 9, 2014. REUTERS/Kai Pfaffenbach (GERMANY - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Borussia Dortmund's Manuel Friedrich (L) goes for a header with Real Madrid's Karim Benzema during their Champions League quarter-final second leg soccer match against Real Madrid in Dortmund, April 8, 2014. REUTERS/Kai Pfaffenbach (GERMANY - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Real Madrid's Cristiano Ronaldo jumps for a ball during a training session in Dortmund April 7, 2014. Borussia Dortmund will play Real Madrid in their Champions League quarter-final soccer match on Tuesday. REUTERS/Ina Fassbender (GERMANY - Tags: SPORT SOCCER) 

AC Milan's Keisuke Honda (bottom) fights for the ball with Genoa's Nicolas Burdisso during their Italian Serie A soccer match at the Ferraris stadium in Genoa April 7, 2014. REUTERS/Alessandro Garofalo (ITALY - Tags: SPORT SOCCER) 

AC Milan's Keisuke Honda (top) is challenged by Genoa's Andrea Bertolacci during their Italian Serie A soccer match at the Ferraris stadium in Genoa April 7, 2014. REUTERS/Alessandro Garofalo (ITALY - Tags: SPORT SOCCER)