Defending champion Stanislas Wawrinka advanced to the semifinals of the Aircel Chennai Open 2015 in India with a straight-set win over Gilles Muller on Friday.

The top-seeded Swiss looked to seal quick things as he needed an hour and 25 minutes to pull off a 6-2, 7-6 conquest of his 46^th-ranked counterpart.

Meanwhile, 3^rd seed Roberto Bautista Agut of Spain and 4^th seed David Goffin of Belgium also entered the last-four stage, following their respective quarterfinal wins.

In doubles, tournament favorites Leander Paes and Raven Klaasen sailed into the finals with a 6-3, 6-3 win over Pablo Carreno Busta and Guillermo Garcia-Lopez.

QUARTERFINALS RESULTS

(1) S Wawrinka d. (8) G Muller (6-2, 7-6)

(4) D Goffin d. A Haider-Maurer (7-5, 6-2)

(3) R B Agut d. (6) Y Lu (7-6, 6-4)

(Q) A Bedene d. (5) G Garcia-Lopez (6-3, 6-3)