Tennis fans have been flocking to the stadium in Garhoud to get their hands on tickets to the Dubai Duty Free Tennis Championships. The Box Office at the tennis stadium- usually open from 9 AM- opens at 8 AM today to accommodate early morning crowds. Seven-time champion Roger Federer will be back in the emirate to defend his title. Other stars competing include men’s world number one Novak Djokovic and women’s world number one Serena Williams. Tickets are also available online on the tournament’s website: http://www.dubaidutyfreetennischampionships.com/en/tickets