A notable rules incident occurred at the Walker Cup involving GB&I golfer Niall Sheils Donegan. During a match against Team USA, Donegan retrieved his ball from the green before his opponent had formally conceded the putt. Under the rules of golf, a player must wait for a concession to be granted before picking up their ball; failing to do so can result in a penalty or the loss of the hole depending on the specific match play circumstances.

The incident has drawn attention due to the high-stakes nature of the Walker Cup, a prestigious amateur tournament. While the rules are clear regarding the necessity of a formal concession, the moment highlights the pressure players face during international competition. Sky Sports reported the event as a "controversy," emphasizing the procedural error made by the player. There is no current indication of whether this specific error altered the final outcome of the match or if there were mitigating factors, such as a misunderstanding between the competitors regarding the status of the putt. The incident serves as a reminder of the strict adherence to etiquette and rules required in high-level match play golf.