Barcelona's Alexis Sanchez and teammate Dani Alves celebrate a goal against Rayo Vallecano during their Spanish First division soccer league match at Camp Nou stadium in Barcelona, Nov 29, 2011. [Photo/Agencies]

Manuel Pfister of Austria competes during the first run in the men's Luge World Cup competition in Innsbruck-Igls, Nov 27, 2011. [Photo/Agencies]

University of Kentucky's cheer leaders cheer for their team during the game against St John's University at Rupp Arena in Lexington, Kentucky, Dec 1, 2011. [Photo/Agencies]

Manchester City's Mario Balotelli (R) is shown a yellow card by referee Martin Atkinson (L) during their English Premier League soccer match against Liverpool in Liverpool, northern England, Nov 27, 2011. [Photo/Agencies]

Roger Federer of Switzerland celebrates winning the men's singles tennis final against Jo-Wilfried Tsonga of France at the ATP World Tour Finals at the O2 Arena in London, Nov 27, 2011. [Photo/Xinhua]

Lin Dan of China returns a shot to his compatriot Chen Long during their men's singles finals match at the China Open badminton tournament in Shanghai, Nov 27, 2011. [Photo/Agencies]

Former Brazil striker Ronaldo during a news conference in Rio de Janeiro, Dec 1, 2011. Brazilian Soccer Confederation (CBF) President and President of the World Cup's local organizing committee Ricardo Texeira announced Ronaldo as an administrative member of the World Cup's local organizing committee. [Photo/Agencies]

Red Bull Formula One World Champion Sebastian Vettel (L) sprays champagne on the podium on teammate Mark Webber of Australia during the Brazilian F1 Grand Prix at the Interlagos circuit in Sao Paulo, Nov 27, 2011. Webber won the race while Vettel was second. [Photo/Agencies]