Federer biographer: Roger has a bad back
Ticker - Thursday, January 5, 2012
Roger Federer has a bad back, reports his biographer, Switzerland's Renee Stauffer, on Twitter. "I wasn't sure if I was going to play against Andreas Seppi," Federer said in Doha. "It happened against Gregor Zemlja (in the second round)." Federer added that it was "good luck it's only a muscular problem."
Federer needed three sets to beat Seppi on Thursday. He is scheduled to face France's Jo-Wilfried Tsonga in the semifinals. The 16-time Grand Slam champion is on a 20-match winning streak that dates back to the 2011 U.S. Open.