Novak Djokovic withdraws from ATP Toronto event AFP Novak Djokovic is chasing history after victories at the Australian Open, Roland Garros and Wimbledon World number one Novak Djokovic, who is bidding for Olympic gold in the Tokyo Games men's tennis tournament, has withdrawn from next month's ATP Toronto event. Organizers alluded to Djokovic's hectic schedule which includes the Olympics and his pursuit of a calendar Golden Grand Slam. The Serb is chasing history after victories at the Australian Open, Roland Garros and Wimbledon. He is seeking to emulate Steffi Graf's unrivalled achievement from 1988 when she swept all four majors and took gold in the women's singles in Seoul.