Federer's incredible gesture for young cancer survivor

Roger Federer has made a young cancer patient's dreams come true, inviting him on court for a hit at the US Open.

During a practice session ahead of his fourth-round clash on Tuesday, Federer met 10-year-old Marc Krajekian, a massive fan who recently fought and beat cancer.

Federer sat and chatted with the youngster, signing some autographs before having a hit with him.

The incredible gesture from the world No.3 clearly left Krajekian overjoyed, the young man struggling to wipe the smile off his face.

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Krajekian was diagnosed with cancer at the age of eight, which led to the amputation of his leg.

Federer reached out to him after hearing of his plight, sending him the following message: "Get well soon Marc and tell me when you're ready and I'll play tennis with you."

The Swiss maestro is clearly a man of his word, following through with his invitation on Tuesday and bringing some delight to the young fan.

Federer has been a man of the people during this year's US Open, earlier in the tournament taking a practice session to a public court in Central Park.

He also enjoyed another brilliant moment with a young fan when he was put on the spot during a press conference.

The 19-time grand slam champion kept alive his chances of a 20th with a vintage straight-sets win over Philipp Kohlschreiber on Tuesday.