Sania Mirza's [Images] challenge in the WTA Dubai Open ended on Thursday when she, along with her Italian partner Mara Santangelo, were beaten by the American-Zimbabwean combine of Liezel Huber and Cara Black in the second round.

The top seeds won 6-3, 6-3.

Sania had earlier crashed out of the singles, losing her second round match 5-7, 2-6 to world No 24 Kaia Kanepi of Estonia on Tuesday.

Kanepi went on to take out third seed Jelena Jankovic [Images] of Serbia 6-2, 7-5 on Thursday.

Sania earned 60 WTA ranking points and prize-money of US $10,275 for making the second round