体坛英语新闻：Federer reaches fourth round, marathon man Isner loses quickly at Wimbledon

Belgians Justine Henin and Kim Clijsters won in straight sets to set up a fourth-round showdown Monday.

Clijsters, seeded eighth, beat No. 27 Maria Kirilenko 6-3, 6-3. Henin, seeded 17th, defeated No. 12 Nadia Petrova 6-1, 6-4.

Clijsters and Henin will play each other for the 25th time, but the first time in a Grand Slam since 2006.

No. 4 Jelena Jankovic beat No. 28 Alona Bondarenko 6-0, 6-3. No. 11 Marion Bartoli, the 2007 runner-up, defeated Greta Arn 6-3, 6-4.