Novak Djokovic was hit in the head by a water bottle as he signed autographs after his victory against Corentin Moutet in the Italian Open.

The tennis player was seen falling to the floor and helped out of the arena in Rome by security.

Tournament organisers said the hard bottle had accidentally fallen out of the bag of someone in the crowd.

The 24-time Grand Slam champion saw the funny side the next day and wore a helmet to greet fans. He shared the video on social media and wrote "I came prepared".