Nadal, Federer battle into quarters

World number one Rafa Nadal saved five match points before beating David Nalbandian 3-6 7-6 6-0 in a classic fourth-round encounter at the ATP event in Indian Wells.

In a match which finished past 0200 (0900 GMT), Argentine Nalbandian had four match points at 5-3 in the second set and another on his own serve at 5-4.

But Nadal showed amazing resilience to break back and then snatch the set on a tie-break, before ripping through the decider for his first win over Nalbandian in three attempts.

World number two Roger Federer, champion Novak Djokovic and fourth seed Andy Murray all joined Nadal in the last eight.

Federer was made to battle for his quarter-final spot, beating Chilean Fernando Gonzalez 6-3 5-7 6-2.

Third seed Djokovic saved a set point against another Swiss, Stanislas Wawrinka, in the second set before clinching a 7-6 7-6 victory, setting up a clash with seventh seed Andy Roddick, who beat Spaniard David Ferrer 7-6 3-6 6-3.

Murray cruised into the last eight when Tommy Robredo retired with a right wrist injury. The Scot was leading 6-2 3-0 when Robredo quit.