WATCH: Roger Federer warms up with young cancer survivor at U.S. Open
Before Roger Federer took the court against Philipp Kohlschreiber at the U.S. Open Monday night, he warmed up on the practice court with a young cancer survivor.
Mark Krajekian considers Federer his hero, according to ESPN. With hundreds of people watching, Krajekian and Federer rallied on the practice court prior to Monday's fourth-round match.
Here's an angle from the stands:
If Kohlschreiber goes for the lob on Monday, we can assume Mark Krajekian gave him the inspiration.