The 17-year-old, who won the Wimbledon boys' singles title last year, was two sets down in the tie's decisive rubber against Kyle Edmund yesterday and smashed a ball in frustration after dropping serve in the third.

It hit Gabas in the umpire’s chair, leaving him with a bruise on the left side of his face.

Shapovalov was disqualified after the incident, meaning Britain won the World Group first round clash 3-2 at the TD Place Arena in Ottawa.

Edmund was 6-3, 6-4, 2-1 up at the time.

The International Tennis Federation (ITF) confirmed the fine but said the teenager had shown no intent.

"Canadian player Denis Shapovalov has been fined $7,000 after being defaulted for unsportsmanlike conduct for unintentionally striking chair umpire Arnaud Gabas in the eye with a ball during the fifth rubber of the World Group first round tie against Great Britain," a statement said.

"Shapovalov did not intend to hit Mr Gabas and personally apologised to him after the incident. 

"No further action is anticipated.

"Mr Gabas went to Ottawa General Hospital for checks on his left eye on Sunday night. 

"No damage to the cornea or retina was reported. 

"He will be undergoing further checks with his personal eye doctor in France on Tuesday."

Shapovalov said he was "ashamed and embarrassed" after the incident.

"I would just like to begin by apologising to that referee and to all ITF officials, and to be honest all officials," he said.

"I went back and spoke to the referee after and apologised directly to him, luckily he was okay.

"Obviously it was just unacceptable behaviour from me and to be honest, I just feel incredibly ashamed and embarrassed and I just feel awful for letting my team down, my country down, for acting in a way that I would never want to act."

Canada’s Davis Cup captain Martin Laurendeau said he knew immediately that his country would be disqualified.

"The rules are the rules, you gotta play by the rules," he said.

"I don’t think it was a planned event. 

"It’s a lesson that he will take from this and move forward. 

"I mean, he’s a kid as you can see, he wants to face the music, he’s not going to shy away, he’s not that kind of guy, he’s got some great talent and it’s just the beginning of his career, so he’ll draw a big lesson out of this."