PGA Tour chief Jay Monahan said Tuesday that fans taunting Bryson DeChambeau by addressing him with the name of his arch-rival Brooks Koepka risked expulsion from future tournaments.

Speaking ahead of this week's season-ending Tour Championship in Atlanta, Monahan waded into the issue of fan behavior which has emerged during the simmering feud between DeChambeau and Koepka.

At several recent events, ­DeChambeau has been heckled with cries of "Brooksie" from the galleries.

On Sunday, after an agonizing playoff defeat to Patrick Cantlay at the BMW Championship, DeChambeau swore in response to a fan who catcalled him with the words "Great job, Brooksie!"

On Tuesday, Monahan said the tour would move to stamp out the heckling, describing it as disruptive behavior bordering on harassment.

"Comments or gestures that undermine the inclusive and welcoming nature of the game will not be tolerated, nor will any harassment of players, caddies, volunteers, officials, staff or other spectators," Monahan said in a statement.

DeChambeau and ­Koepka's long-running feud has simmered since 2019, when ­Koepka made complaints about DeChambeau's slow play. 

In May this year, Koepka couldn't hide his annoyance after DeChambeau photobombed him during an interview following the PGA Championship which went viral.

News of the Tour's crackdown was greeted with amusement by some other professionals on Tuesday.

"It's official. Calling Bryson anything but his real name will get you thrown out of a golf tournament," wrote South Korea-born world No.179 James Hahn on Twitter. "So if any one of you call me Kevin Na, Danny Lee or Sang Moon Bae, we're gonna have some problems."

England's Lee Westwood added, "I've been  called Lumpy, Oosty, Clarkey (amongst other names that I can't mention) on and off for the last 25 years!!! And now you bring a rule in @PGATOUR."