Federer digs deep to advance to semis

Roger Federer recovered from a nightmare first set to beat Swiss compatriot Stanislas Wawrinka and advance to the semi-finals of the Stockholm Open in the Swedish capital last night.

Federer made a poor start and dropped the first set against Wawrinka, but fought back well to score an ultimately comfortable 2-6 6-3 6-2 success and move into the last four.