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 post-match comments about a chair umpire he called the “worst ump on tour.”

Have you ever noticed that some of the savage battles on a tennis court don’t happen between the players? The post ‘Worst Ref in the ATP’- Reilly Opelka Brutally Slams Chair Umpire After Controversy Erupts at the ATP Dallas appeared first on EssentiallySports.

Reilly Opelka called for chair umpire Greg Allensworth to be suspended by the ATP after Opelka received a code violation at the Dallas Open for confronting a spectator in the stands who he claimed was deliberately coughing to interrupt his serve.

The American battled against Cameron Norrie in the second round and prevailed 4-6, 7-6, 6-4 in two and a half hours. Opelka dropped the opener and trailed 5-4 in the tie break of the second set. He kept composure and grabbed the final three points to force a decider.

Reilly Opelka launched into stinging criticism of chair umpire Greg Allensworth for penalising him following a confrontation with an "idiot" heckling fan.