Roger Federer annoyed with performance

Roger Federer has revealed that he was disappointed with his performance during his win over Adrian Ungur in the second round of the French Open.

The world number three sealed a record 234th victory in a Grand Slam when he saw off the Romanian 6-3 6-2 6-7 6-3 at Roland Garros on Wednesday.

However, the 30-year-old believes that he gave his opponent too many opportunities during the contest.

"Instead of being aggressive I let him show me what he could do," Federer told reporters. "He played two beautiful shots and he played very well."

The 16-time Grand Slam winner will face France's Nicolas Mahut in the next round.