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.

Daniil Medvedev expecting ‘big fine’ after US Open outburst - The Russian was incensed after his opponent Benjamin Bonzi was allowed to retake a first serve at match point.

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.