Japan Open: Wawrinka, Nishikori in semis

The top-seeded Wawrinka saved all break points to dispatch the American qualifier in just 59 minutes. Meanwhile, Nishikori saved one break point in the first game of the third set. Despite receiving treatment on his right shoulder after the third game, he immediately broke Cilic and went on to record his 51st win of the year.

Stan Wawrinka celebrates after beating Austin Krajicek 6-3, 6-4.   -  Reuters

Kei Nishikori overcame Marin Cilic 3-6, 7-5, 6-3 to enter the semis.   -  Getty Images

French Open champion Stan Wawrinka overpowered Austin Krajicek 6-3, 6-4 on Friday to enter the semifinals of Japan Open.

The top-seeded Wawrinka saved all break points to dispatch the American qualifier in just 59 minutes. The Swiss, who has won three titles this year, will face Luxembourg's Gilles Muller in Saturday's semifinals. Muller beat Gilles Simon of France 6-3, 6-4.

Wawrinka has beaten Muller twice this year in Chennai and Rotterdam. Muller hit eight aces and lost just six points on his first serve. The 32-year-old is bidding to reach his first ATP final since Atlanta in 2013.

Defending champion Kei Nishikori beat Marin Cilic 3-6, 7-5, 6-3 to set up a match against Benoit Paire. Paire beat Nick Kyrgios 3-6, 6-4, 6-1.

Nishikori saved one break point in the first game of the third set. Despite receiving treatment on his right shoulder after the third game, he immediately broke Cilic and went on to record his 51st win of the year.