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

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 ...

Reilly Opelka of the U.S. plays a forehand return to Tomas Machac of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia ...

DALLAS — Reilly Opelka faces ... Afterward, Opelka said umpire Greg Allensworth failed to do his job. The ATP says it will review Opelka's post-match comments as part of the disciplinary process.