Tennis star Novak Djokovic has thanked the Duchess of Cornwall for taking the time to visit one of the projects supported by his foundation.

The world number one player took time out of his busy schedule to record a video message for the Duchess which was played when she visited the Zvecanska Centre in Belgrade, Serbia.

Camilla was at the centre as part of a six-day tour of the Balkans with the Prince of Wales, and she met representatives of Unicef and the Djokovic Foundation who have been providing family outreach workers.