His opponent, Roger Federer, world number 2, is through to the finals where he will play Marin Cilic in what is being deemed as a repeat of the Wimbledon final in 2017. 

Chungs claps to the crowd as he walks off, and they respond in kind. It's been a great run for the Korean, but this isn't the way he will have wanted it to finish. 

The finals will be played on Sunday.