The 2012 U.S. Open continued Monday, and two of the most notable names advanced to the fifth round.
On the men's side, No. 1 seed Roger Federer moved on when his opponent, No. 23 seed Mardy Fish, withdrew from the tournament for health reasons.
"I regret that I have to withdraw from the U.S. Open for precautionary measures," Fish said in a statement.
Tomas Berdych, the No. 6 seed, also advanced with a 7-6, 6-4, 6-1 win againt No. 11 Nicolas Almagro.
No. 4 Serena Williams continued her strong play, advancing to the fifth round with a 6-0, 6-0 win against Andrea Hlavackova. Williams is yet to drop a set in four U.S. Open matches. While Williams advanced, No. 6 seed Angelique Kerber and No. 2 seed Agnieszka Radwanska both lost in straight sets.
Monday's complete schedule can be found at the official U.S. Open site, and live men's and women's scoreboards are available from Sports Illustrated.
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