WIMBLEDON - MARIA Sharapova won seven straight games during one stretch but let a late lead slip away on Wednesday and lost to Gisela Dulko, 6-2, 3-6, 6-4 in the second round at Wimbledon.

Sharapova saved four match points in a wild, 14-point final game.

But on the fifth she pushed an easy forehand long, and she was out of the tournament after two rounds for the second year in a row.

The 2004 champion was playing in her fourth event since rejoining the tour last month following shoulder surgery in October. She's ranked 60th but was seeded 24th because of past success at the All England Club.

'This is not an overnight process,' Sharapova said. 'It's going to take time, as much time as I need on the court, to get everything together. ... Just being here is a wonderful accomplishment.'

Dulko, ranked 45th, matched her best showing at Wimbledon by reaching the third round. She had won a total of only three games in two previous matches against Sharapova, but the Argentine repeatedly won points by hitting drop shots, while Sharapova struggled with her serve and forehand.

'I had so many easy balls, and I just made unforced errors from those,' Sharapova said.

'When I've had those situations before, those balls would be pieces of cake, and today they weren't.'

Serena Williams and Roger Federer advanced with little trouble.

Williams, a two-time champion seeded second, committed only six unforced errors and beat Jarmila Groth 6-2, 6-1.

Federer, bidding for his sixth Wimbledon championship and a record 15th major title overall, defeated Guillermo Garcia-Lopez 6-2, 6-2, 6-4. -- AP