Complex sentence: Vinokourov then started his sprint, taking Uran by surprise, who could not close the gap as the Kazakh sailed to the finish line and the gold medal.
Split into simpler sentences: Vinokourov then started his sprint, taking Uran by surprise. Uran reacted with a delay since he didn't see the move and could not close the gap as the Kazakh sailed to the finish line and the gold medal.