 Boateng had his penalty for Portsmouth saved in the 54th minute, four minutes before Didier Drogba scored Chelsea’s winning goal.During the match, Boateng fouled Chelsea midfielder Michael Ballack, injuring Ballack's ankle and ruling him out of the impending 2010 World Cup.Boateng claimed that Ballack slapped him in the face prior to this, and that he apologised to Ballack personally for the tackle which left him injured.