Rafael Nadal collapses at post-match press conference

A scary moment happened to one of the favorites at this year's U.S. Open, and it wasn't anywhere close to a tennis court when it went down. Defending champion Rafael Nadal was taking questions after his straight-set win on Sunday over David Nalbandian when he started to grimace, only to collapse under the microphone desk. The interview room was cleared, and after 10 minutes, reporters were allowed back in. Nadal assured everyone he was okay, and it was just cramps, but needed ice packs for his legs and was in what looked like serious pain. Watch below.