Somdev, who led two sets to one when rain interrupted the match, returned to clinch it over five sets, 4-6, 6-1, 6-2, 4-6, 6-4, in three hours 11 minutes Wednesday.

The Indian next plays World No.20 Italian Andrea Seppi, who overcame Belgian veteran Xavier Malisse in four hard-fought sets, 6-3, 3-6, 7-5, 7-5.