Stan Wawrinka moved closer to winning the Chennai Open for a third successive year as he eased into the semi-finals by overcoming Guillermo Garcia-Lopez on Friday.
The top seed's serving game proved formidable in India as he fired 14 aces and won 82 per cent of points off his first serve at the SDAT Tennis Stadium.
Wawrinka was broken only once by the world number 27 and saw out a relatively comfortable 6-4 6-4 victory in 77 minutes, extending a winning streak at the ATP 250 competition, which began in 2014, to 10 matches.
The Swiss will face Benoit Paire - with whom he claimed the doubles title at this event in 2013 - in the semi-finals after the Frenchman eliminated Thomas Fabbiano.
Fabbiano was making his first quarter-final appearance on the ATP Tour could but could only take four of 10 break points on offer as he fell to a 6-4 7-5 loss.
Home hope Ramkumar Ramanathan failed to book a place in the final four in a 6-7 (5-7) 6-4 6-3 defeat against 2015 runner-up Aljaz Bedene.
To return to the final for a second successive year Bedene will have to overcome Borna Coric, who recovered from losing the first set to defeat Roberto Bautista Agut - ranked 19 places above him at 25 in the world - to triumph 3-6 6-4 7-6 (7-1).