Rohan Bopanna's [ Images ] campaign in the ATP Challenger series tournament in Tashkent ended with a quarter-final defeat in the doubles, at the US $125,000 event, at the Olympic [ Images ] Tennis School.

Bopanna and his partner Purav Raja put up a brave fight before losing 6-7(4) 6-3 to the top seeded pair of Oliver Marach [ Images ] of Austria and Lukasz Kubot [ Images ] of Poland.

Bopanna had lost his singles second round match to top seed Yen-Hsun Lu on Thursday.