Novak Djokovic suffers shock straight-sets defeat to teenager in Wimbledon warm-up

The world number one struggled with Zverev's serve throughout and went down in straight sets in his second grass-court match of the year, having already beaten Richard Gasquet.

18-year-old Zverev is ranked 76th in the world, and takes on Russia's Teymuraz Gabashvili in the first round at Wimbledon while Djokovic faces Philipp Kohlschreiber.

"I’m getting ready. I played two matches and I think that’s going to be enough to get myself ready for Wimbledon," said Djokovic afterwards.

"Wimbledon is number one for me because it’s the most prestigious, most historic event we have. I play against Kohlschreiber in the first round there, which is one of the toughest first rounds, so I have to focus on that."

Elsewhere at the Boodles, Rafael Nadal beat Robin Haase 6-4 6-2.