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Roger Federer has advanced to Saturday's semifinals at the BNP Paribas Open after his opponent in the quarterfinals was forced to withdraw due to suspected food poisoning on Friday.

Kyrgios posted a note on Twitter announcing his withdrawal from the tournament: 'Unfortunately I am unable to play today due to sickness.

Aside from reaching his second ATP semi-final in as many weeks, Kyrgios joined his Davis Cup captain and mentor Lleyton Hewitt in the rarest of clubs as the only two players to have conquered grand slam giants Roger Federer, Rafael Nadal and Djokovic in their first tour-level match-ups.

Whoever emerges as the victor will play fourth seed Kei Nishikori or American Jack Sock. Wednesday's match was just the fifth time they weren't opposing each other in a final.

It comes after the 21-year-old was spotted dipping into a courtside fan's chips during his doubles exit on Thursday.

"I am serving really well". Kyrgios fired 25 aces in that 7-6 (9), 7-5 victory, which was his first match against Djokovic. The Aussie ended three-time defending champion Novak Djokovic's reign at Indian Wells by knocking off the world's second-ranked player 6-4, 7-6 (3).

Perhaps it's time for us to judge him from a different vantage point, to see the calibre behind all that sassiness.

Djokovic still gave credit to Kyrgios who has now won all four sets from Novak. However this week, he will just have one day off before he returns to the court to take on Novak Djokovic's conqueror Nick Kyrgios in the quarter-finals.

"I was able to hold my serve, and Rafa couldn't find a way to get into my service games more frequently".

"Hope you feel better @NickKyrgios", said the Swiss ace, who took the court briefly on Friday to speak to disappointed fans.

Federer has a 2-0 career record against Sock, including a victory here in the round of 16 in 2015, and a 5-2 career edge in head-to-head play against Nishikori, including a five-set win in the round of 16 during Federer's push to the Australian Open title. "So to be back on court feeling normal again is so nice. That's maybe going to take a bit more time".

Mladenovic will play the victor of a later match between 12th-seeded Venus Williams and No. 14 Elena Vesnina.

  • Stacy Allen