Stan Wawrinka and Roger Federer of Switzerland have advanced to semifinals of Australian Open Tennis tournament. Wawrinka won against Jo-Wilfried Tsonga of France 7(7)-6(2), 6-4, 6-3, while Federer defeated Mischa Zverev of Germany 6-1, 7-5, 6-2. Notably, Rafael Nadal of Spain will face Milos Raonic of Canada on Wednesday.