Novak Djokovic wears helmet to Italian Open hours after being hit on head with bottle
![Novak Djokovic wears helmet to Italian Open hours after being hit on head with bottle](https://i2-prod.mirror.co.uk/incoming/article32787334.ece/ALTERNATES/s615/1_Novak-Djokovic.jpg)
Tennis star Novak Djokovic was hit on the head when a water bottle dropped on him while signing autographs at the Italian Open on Friday - and he's made a joke out of the situation