Sania Mirza's singles campaign at the Wimbledon championships ended with a 4-6 4-6 second round loss to Romanian 28th seed Sorana Cirstea here on Wednesday.

Unforced errors proved costly for the Indian in the one-hour-22-minute contest as she yet again failed to move beyond the second round here.

Sania played mostly from the baseline but struggled to keep her booming strokes within the court.

The inability to win points on serve added to the woes of the unseeded Indian against an opponent ranked as high as 27th in the world.

Sania had the first opportunity to get a break but Cirstea denied her friend the favour.

Sania then committed a double fault in the fifth game to hand the Romanian a break chance.

Sania saved four breakpoints in that game but another double fault undid all the good work.

That one break proved costly for the Hyderabadi as the next four games went with serve with Cirstea claiming the first set.

The second set too started on an ominous note as Sania dropped her serve in the very first game. Though she managed a double break – second and fourth games -- to take a 3-1 lead, the unrelenting errors allowed the Romanian claw her way back.

Sania will now look to put up a better show in doubles where she and her Taipei partner Chia-Jung Chuang will take on Americans Jill Craybas and Carly Gullickson.