Becker has been Djokovic’s coach ever since 2013, and the German has overseen and played a big part in some of the biggest wins of Djokovic’s career – including several Wimbledon titles.
But Becker looked absolutely furious as Djokovic went crashing out of this year’s competition at the third round stage, after failing to get to grips with big-serving American Sam Querrey.
It was Djokovic’s earliest exit from a Grand Slam since 2009, and will obviously still be fresh in Becker’s mind.
But McEnroe is coach of Canadian Milos Raonic – who essentially replaced Djokovic in today’s semi-final against Roger Federer.
The American couldn’t resist when he saw an opportunity to wind-up his old foe:
— BBC Sport (@BBCSport) July 8, 2016
Who do you think will come out on top in Sunday’s final? Is it Andy Murray’s to lose?