Chennai - Stan Wawrinka advanced to the semi-finals of the Chennai Open with a 6-4, 6-4 win over fifth-seeded Guillermo Garcia-Lopez of Spain on Friday.
The top-seeded Swiss, a two-time defending champion, fired 14 aces to set up a clash with third-seeded Frenchman Benoit Paire.
Paire also served 14 aces as he defeated Thomas Fabbiano of Italy 6-4, 7-5.
Last year's finalist Aljaz Bedene of Britain and Borna Coric of Croatia will play in the other semi-final.
Bedene saved all three break points in a 6-7 (5), 6-4, 6-3 win over India's Ramkumar Ramanathan.
Eighth-seeded Coric defeated fourth-seeded Roberto Bautista Agut 3-6, 6-4, 7-6 (7/1) in the longest quarter-final that stretched to two hours, 31 minutes.
Results from the sixth day of the Chennai Open on Friday:
Stan Wawrinka (SUI x1) bt Guillermo Garcia-Lopez (ESP x5) 6-4, 6-4
Benoit Paire (FRA x3) bt Thomas Fabbiano (ITA) 6-4, 7-5
Aljaz Bedene (GBR) bt Ramkumar Ramanathan (IND) 6-7 (5/7), 6-4, 6-3
Borna Coric (CRO x8) bt Roberto Bautista Agut (ESP x4) 3-6, 6-4, 7-6 (7/1)