Bayern Munich's player Arjen Robben celebrates for a goal during the 17th round of Bundesliga football match against Mainz in Berlin, Germany, on Dec. 19, 2014. Bayern Munich won 2-1. (Photo source: Xinhuanet/Reuters)

Bayern Munich's player Mario Götze (R) vies for the ball with Mainz player Ku Ja-Cheol during the 17th round of Bundesliga football match against Mainz in Berlin, Germany, on Dec. 19, 2014. Bayern Munich won 2-1. (Photo source: Xinhuanet/Reuters)

Bayern Munich's player Bastian Schweinsteiger (R, 1) celebrates the victory with teammates during the 17th round of Bundesliga football match against Mainz in Berlin, Germany, on Dec. 19, 2014. Bayern Munich won 2-1. (Photo source: Xinhuanet/Reuters)