http://www.atpworldtour.com/News/Tennis/2009/09/Davis-Cup-PO-Swiss-Serbia-Sweden-Win-Ties.aspx "It was a tough weekend for us and I'm happy I could help Switzerland win," said Federer, who finished runner-up to Juan Martin del Potro at the US Open last week. "I was able to play very well. I have to go on holiday badly. I have a problem with my leg, I have a problem with my arm — everything is hurting. And I've got to do some baby-sitting." Does anybody think this is serious or that he may pull out of the an Tokyo/Shanghai?