ATP Finals 2018: 5 Talking points from Alexander Zverev's stunning win over Novak Djokovic

#3 Djokovic’s game falls apart

Nitto ATP Finals - Day Eight: Below Par Serves

At the beginning of the week, Djokovic was the undoubted hot favorite to win the tournament. Everyone expected him to demolish the opposition with his error-free game.

What we didn't expect was how quickly his game would unravel after getting broken in the first set. Djokovic looked mentally worn out as the points slipped past him, and his serve was below par. Moreover, he made multiple unforced errors off the ground, which was very uncharacteristic.

“From 4-4 in the first set, my game fell apart. But if we put things in perspective it has been an amazing year and a great comeback,” Djokovic said.