Stars including Goldie Hawn, Kate Hudson and Gerard Butler gathered on Monday (08Jul13) to help tennis ace Novak Djokovic raise $1.7 million (£1.1 million) for his charity. Hawn and her daughter Hudson served as event chairs at the glittering gala alongside former British royal Sarah Ferguson, Duchess of York, supermodel Naomi Campbell and former tennis champion Boris Becker. Actor Jeremy Piven joined British TV presenter Jonathan Ross and Hudson on stage at the Roundhouse venue in London for a mini tennis match, while Becker provided the commentary. Guests bid on auction prizes including a yacht getaway with Hawn and Hudson, a signed guitar by The Rolling Stones' Ronnie Wood and a seven-day holiday at Sir Richard Branson's private island. Djokovic says of the event, "I am delighted to be joined... by friends and family to support a cause which is so close to my heart. The Foundation works alongside young children in Serbia to provide support, encouragement and resources so they can fulfil and nurture their dreams. With the help of such generous people, our vision is to expand our work to the U.K. and America and transform the lives of more children around the world." All funds raised during the evening will benefit the Novak Djokovic Foundation, which aims to support vulnerable and disadvantaged children, especially in the tennis star's native Serbia. The event took place just a day after Djokovic lost the Wimbledon Championships men's singles title to Andy Murray on Sunday (07Jul13).