The Serb, who beat Federer in the final of the world number one's home-town event in Basle on Sunday, looked a little jaded and appeared in trouble at 2-5 in the second set.
Atletico Madrid moved further away from relegation trouble with a 2-0 victory at promoted strugglers Xerez, with star strikers Diego Forlan and Sergio Aguero scoring in each half.
Apple Insider says that the company has experienced a growing number of users reporting trouble connecting their iPad 2 3Gs, especially after resetting the 3G service.