Novak Djokovic will be bidding for a quarterfinal spot at the U.S. Open when he takes the court on Monday against Philipp Kohlschreiber. Andy Murray and Jo-Wilfried Tsonga are also in action.

(1) Novak Djokovic vs. (22) Philipp Kohlschreiber

Djokovic and Kohlschreiber will be squaring off for the sixth time in their careers when they clash in round four of the U.S. Open on Monday. The head-to-head series stands at 4-1 in Djokovic’s favor, including 2-0 on hard courts. They most recently faced each other this spring on the clay courts of Rome, where Djokovic prevailed 4-6, 6-2, 6-1. Kohlschreiber’s lone victory over the current world No. 1 came via a 6-4, 6-4, 6-4 decision in the third round of the 2009 French Open.

Kohlschreiber booked his place in the last 16 with a third consecutive U.S. Open third-round victory over John Isner. The 25th-ranked German, who preceded that triumph…