At Wimbledon in 2017, Medvedev was fined after emptying his wallet and throwing coins at umpire Mariana Alves following a five-set loss to Belgium's Ruben Bemelmans. He disputed a series of controversial calls and said after the match "it was very hot out there" and couldn't remember if he'd asked for Alves' removal.

Controversy arose early in the US Open, as Daniil Medvedev's first-round loss against Benjamin Bonzi featured a moment that raised eyebrows at Louis Armstrong Stadium.

Carlos Alcaraz was almost unrecognizable when he stepped on the court against Reilly Opelka for his first-round match the US Open. His usual bushy, mop haircut was replaced by an unexpected buzz cut as a result of a pre-game mishap involving his brother.

Carlos Alcaraz showed up at the U.S. Open on Monday for his first-round match with a new look: a shaved head. Alcaraz, who is seeded No. 2 at Flushing Meadows, caused a bit of a buzz with his buzz cut when he got to the tournament grounds before heading out to beat big-serving Reilly Opelka 6-4,

The five-time Grand Slam winner got slammed by one foe for his new style, but there's a funny story behind it.