India, Aug. 31 -- A shocking moment at the US Open has triggered widespread outrage after a grown man was caught on camera taking a signed cap intended for a young fan. The incident unfolded as Polish tennis player Kamil Majchrzak celebrated his thrilling five-set win over ninth seed Karen Khachanov.

After the win, Majchrzak was signing autographs for fans when he removed his hat and tried to hand it to a boy in the stands. But before the child could grab it, a man standing nearby snatched the souvenir and stashed it in his wife's bag - ignoring the boy's protest of, "What are you doing?"

The man has since been identified as Piotr Szczerek, a Polish businessman and CEO of paving company Drogbruk.

Tennis pro Kamil Majchrzak, speaking to...