Reilly Opelka faces potential discipline for his post-match comments about a chair umpire he called the “worst ump on tour.”

Reilly Opelka criticized chair umpire Greg Allensworth following a match at the Dallas Open. Opelka was penalized for swearing at a spectator he claimed was disturbingly disruptive. The ATP is considering disciplinary action,

The American giant immediately went to discuss the situation with Allensworth, who obviously did not revert his decision. The American player was fuming, but he was able to serve out the match, winning 4-6, 7-6 (5), 6-4.

Opelka criticized the umpire after he was penalized for twice swearing at a spectator, describing him as 'amateur hour' and 'bush league.'

Reilly Opelka faces potential discipline for his postmatch comments about a chair umpire he called the "worst ump on tour."

The 211cm American let rip at the chair umpire over his lack of action against a fan heckling him from the stands.