Tommy Robredo lose straight sets in the 3rd round of US Open 07

The world no.8 Tommy Robredo lose to No.88 seed Ernests Gulbis from Latvia in straight sets 1-6, 3-6, 2-6. Looking at the score, Robredo is very much dominated by this young man from Latvia. Ernests Gulbis will face Carlos Moya in the fourth round and this will not be an easy match for Carlos Moya based on the winning form so far for Gulbis. Will fatigue affect Carlos Moya's performance in the fourth round against Gulbis?