Rafael Nadal is one win away from a potential U.S. Open showdown against Roger Federer. Standing in Nadal’s way of the quarterfinals on Monday is Philipp Kohlschreiber.

Rafael Nadal and Philipp Kohlschreiber will be squaring off for the 11th time in their careers at the ATP level when they clash in round four of the U.S. Open on Monday night.

Nadal is dominating the head-to-head series 9-1, including 5-0 on hard courts. Kohlschreiber’s lone victory came in their only grass-court encounter last summer in Halle, just after Nadal had captured a seventh French Open title (the German prevailed 6-3, 6-4). They most recently faced each other this spring on the clay courts of Monte-Carlo, where Nadal cruised 6-2, 6-4.

Normally a fast hard court would be thought of as a decent surface for Kohlschreiber in this matchup, but not so at the moment. Nadal is undefeated on hards in 2013…