Serena Williams defeated Jelena Janković in the final, 6–4, 7–5 to win the women's singles tennis title at the 2008 US Open. It was her third US Open singles title and ninth major singles title overall. With the win, she regained the world No. 1 singles ranking for the first time since 2003. This was also her second US Open and third major overall won without losing a set during the tournament. Three of the top four seeds were in contention for the No. 1 ranking at the start of the tournament.
