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[caption id="attachment_35022" align="aligncenter" width="580"] Fourth seed Stan Wawrinka advances to semifinals. Image Source: twitter[/caption] Internet Desk: Stan Wawrinka could face countryman Roger Federer in an enticing Australian Open semi-final after advancing to the last four with an impressive straight-sets win over Jo-Wilfried Tsonga. Federer still has to get past German giant killer Mischa Zverev on Tuesday evening to make the semi-finals, but 2014 champion Wawrinka booked his place after beating Tsonga 7-6 (7-2), 6-4, 6-3 in two hours and 14 minutes on Rod Laver Arena. It is the third occasion Wawrinka, seeded fourth, has made at least the semi-finals at Melbourne Park. The 31-year-old Wawrinka, the reigning US Open champion, is bidding to become the first man other than Federer, Rafael Nadal and Novak Djokovic to win successive major singles titles since Andre Agassi at the turn of the century. Wawrinka's victory over Tsonga was his 11th in a row at major level but it was not without incident. The two were involved in an animated exchange after Wawrinka won the opening set, apparently over eye contact. Wawrinka said Tsonga was always a tough customer to deal with on court. "It's never easy to play against him ... he's a strong player and the conditions were quite fast today," he said. "In the first set, I think I rallied a bit too much but then I started to move a bit better and be a bit more aggressive and I think that was the difference."