Tennis: Federer battles into quarter-finals

Defending champion Roger Federer battled past fellow Swiss Stanislas Wawrinka 6-3, 6-7 (4/7), 7-5 on Wednesday to reach the quarter-finals of the Indian Wells Masters.

Federer, seeded second behind Novak Djokovic and chasing his first title since Cincinnati last August, could get a quarter-final clash with his great rival Rafael Nadal, who was to play Latvian qualifier Ernests Gulbis in the fourth round later Wednesday.