NEW YORK, Aug. 31 -- A young boy named Brock was left heartbroken when a fan snatched a cap that Polish tennis player Kamil Majchrzak had intended to give him after his thrilling victory over Karen Khachanov at the US Open on Thursday.

In the video, Brock can be seen in the stands as Majchrzak signs autographs. The player removed his cap to give it to Brock, but a nearby fan quickly grabbed it and stuffed it into his bag, leaving the boy stunned and upset.

As reported by The Sun US, the video of the incident quickly went viral, sparking outrage from tennis fans around the world.

Once Majchrzak learned what had happened, he made it his mission to fix the situation.

He reached out on social media, saying, "Thanks to @asicstennis I've go...