WATCH: Roger Federer warms up with young cancer survivor at U.S. Open

1:44 | Tennis
U.S. Open: Roger Federer's Back Will Be Deciding Factor
Monday September 4th, 2017

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. 

Mark Krajekian, a cancer survivor, helped his hero Roger Federer warm up for his match.

A post shared by espn (@espn) on

Here's an angle from the stands: 

If Kohlschreiber goes for the lob on Monday, we can assume Mark Krajekian gave him the inspiration. 

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide — from Peter King, Tom Verducci, Lee Jenkins, Grant Wahl, Andy Staples and more — delivered straight to you, along with up-to-the-minute news and live scores.