Novak Djokovic apologises over Australian Open final antics that may land him $20,000 fine

“In a professional sport, things happen that obviously you’re not proud of,” he said.

“Sometimes you do things that you’re not happy with and you go through different emotions, you go through ups and downs.

“Of course, I’m not happy that I touched the chair umpire. And I’m sorry if I offended him or anybody else.

“But in the heat of the battle, some decisions that he makes or some decision that happens just distracts you and sets you off the balance a little bit.

source: express.co.uk