Defending champion Stan Wawrinka raced into the Chennai Open quarter-finals as he brushed aside Andrey Rublev in under an hour.

Wawrinka has won the past two tournaments in India – taking him to three titles in total – and looks in fine form to make it three in a row after a 6-3 6-2 win on Wednesday.

Rublev's serve was under pressure throughout their second-round clash, Wawrinka able to convert one of the six he created to take the opening set.

The young Russian wobbled at the start of the second set and Wawrinka took full advantage with some impressive groundstrokes, the Swiss racing into a 5-1 lead before serving out for victory.

Next up is Guillermo Garcia-Lopez after the Spaniard also enjoyed a straight-sets win in the second round, the fifth seed beating Ante Pavic 7-6 (7-5) 6-1.

Rising star Borna Coric continued his winning start to 2016 with a 6-2 7-5 victory over Austin Krajicek, setting up a last-eight encounter with Roberto Bautista Agut, who saw off John Millman 6-4 6-1.