World number one Novak Djokovic returns in action as the tournament 's top seed ( and defending champion ) followed by two - time champion Andy Murray and Stan Wawrinka .
World number one Novak Djokovic skipped the China Open in Beijing last week .
World number one Novak Djokovic , who skipped the China Open in Beijing last week , returns in action as the tournament 's top seed ( and defending champion ) followed by two - time champion Andy Murray and Stan Wawrinka .