Swiss tennis ace Roger Federer unveils One Handed Backhand Boys band

Indian Wells Stan Wawrinka Holds Off Dominic Thiem to Reach Semi-finals

Jack Sock thinks Roger Federer is the best tennis player in history, but that doesn't mean the 18th-ranked American is discounting his chances against the Swiss great in the Indian Wells semi-finals.

Federer, Foster, Grigor Dimitrov and Tommy Haas reunited to perform a more polished, well-practiced rendition of the 1980s classic "Hard to Say I'm Sorry" by the band Chicago.

Federer has a chance of making his second final of the season following his triumph at the Australian Open and could face countryman Stan Wawrinka in the summit clash, as he takes on Robert Bautista Agut in the other semi-final.

"I was actually really looking forward to the match", said Federer, who had looked sharp in a 6-2 6-3 dismantling of Rafael Nadal in the fourth round - a reprise of his thrilling five-set victory over his old foe in the Australian Open final.

"I don't take this decision lightly, these are the matches we train for but I'm in no fit state to take to the court".

" I want to wish Roger the best of luck for the rest of the tournament and thank every one for their support so far".

Nishikori had not dropped a set in the tournament until Friday.

"I'm very impressed with him taking out Novak, back-to-back weeks, on Novak's best surface". "I played one tournament where I felt normal".

Having had an easy passage to the last-four match, Sock, who will be raring to go and make it to the next level with a big win, will have to be at his best if he has to produce the goods against Federer.

Wawrinka has appeared in the doubles final at the event, when he lost alongside Roger Federer in 2011, and he could meet his compatriot on Sunday if he overcomes Jack Sock in the second semi-final. Pospisil reached the third round as a qualifier, beating Yen-Hsun Lu and Andy Murray in the main draw before succumbing to Dusan Lajovic in three sets.

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