Novak Djokovic at centre of latest Wimbledon outfit controversy

Novak Djokovic was involved in a bizarre outfit controversy during his four set victory over Hubert Hurkacz at Wimbledon.

Djokovic left his chair to resume serving in the first set on a sunny day in London on Court One when the chair umpire ruled his hat violated the all white outfit code at SW19.

The Serb was confused because while he was questioned over the hat in his previous match he was able to continue with it on.

The Serbian seemed bewildered that the black strip on the underside of his cap broke code.

Novak Djokoivc's hat breached the all-white dress code at Wimbledon. (Getty Images)

“Very simple, last match ... I was starting to unpack my hat. The chair umpire said he needs to check whether or not I'm able to play with it," he said.

“He got a confirmation that I'm able to play. So I got the permission. I played with the hat. The same hat I took out now, I was not able to play with it.

“That's why I was just questioning that call. I mean, no one has approached me before the match to tell me, 'Well, you can't really play with the hat this match.' That's all."

Djokovic said he was able to put the controversy aside and play on, but wondered why no Wimbledon official approached him before to let him know of the breach.

The World No.1 defeated Hurkacz 7-5, 6-7 (7-5), 6-1, 6-4.