Nadal slumps over with cramps at press conference

Defending champion Rafael Nadal sensationally collapsed in agony in the middle of a US Open news conference on Sunday, just two hours after securing his fourth round place. The 25-year-old world number two was talking to the Spanish media following his third round win over close friend David Nalbandian when he grimaced in pain, screwed up his eyes and slumped in the back of his chair, feeling his right leg.