Tennis: Federer through to the last sixteen at US Open, Sharapova out

Former US Open champion Roger Federer fought back after dropping the first set to defeat Marcel Granollers in four sets and reach the fourth round at Flushing Meadows. The first set was disrupted by rain and Granollers won 6-4 but then Federer turned on the style and won the following three sets by the same score: 6-1. In the next round Federer will meet Spain's 17th seed Roberto Bautista Agut, who beat France's Adrian Mannarino 7-5 6-2 6-3.

"I enjoyed it. I thought it was a good match and I'm happy I was able to come back and turn it around," said Federer. "Marcel started really on fire. The break helped me and I came out and played some great tennis."Spaniard David Ferrer was the first top-10 casualty in the men's draw, losing to Gilles Simon 6-3 3-6 6-1 6-3. In the women's tournament Swiss 17-year-old Belinda Bencic produced the upset against ninth seed Jelena Jankovic and won 7-6 (8-6) 6-3 to reach the quarter-finals.

The even bigger upset was the exit of Maria Sharapova who leaves the tournament with a staggering number of 30 double faults. Caroline Wozniacki defeated Maria Sharapova 6-4 2-6 6-2. Wozniacki said: "By the end of the second set I just thought to myself, 'Try to hit through the ball. Just go for your shots. Prepare yourself for the third set.' When we had that break I said, 'OK, win or lose, I'm going to go for my shots. I'm going to go for it. This is the only chance I have to win. If I'm going to lose, at least I'm going to do it with dignity.'"

Novak Djokovic remains the favourite to win the men's tournament, 11/10 at Bet365, while Serena Williams is 4/6 to win the women's event.