British number two Aljaz Bedene has reached the second round of the Chennai Open with a 7-5 7-6 victory over world number 39 Vasek Pospisil.
Slovenia-born Bedene, ranked 45, took one hour and 46 minutes to see off the 2015 Wimbledon quarter-finalist.
He will next face Italy's Luca Vanni, ranked 61 places below him, for a place in the quarter-finals.
Bedene, 26, is preparing for the Australian Open, which starts on 18 January.