OEIRAS, Portugal — Roger Federer recovered from an erratic start to beat Arnaud Clement 7-6 (7), 6-2 Friday and reach the semifinals of the Estoril Open.

Federer will play defending champion Albert Montanes, after the fourth-seeded Spaniard defeated Pablo Cuevas 6-4, 6-3.

Fifth-seeded Guillermo Garcia-Lopez advanced when Alberto Martin retired with the score at 6-0, 2-0.

There were upsets in both women's semifinals, as Arantxa Parra Santonja of Spain overcame second-seeded Sorana Cirstea of Romania 6-1, 6-4, and Anastasija Sevastova of Latvia rallied to beat No. 7 Peng Shuai of China 6-7 (6), 6-1, 6-3.