After facing high temperatures on the Asian swing of the tennis tours, some players are questioning the sport's heat policies.

After facing high temperatures on the Asian swing of the tennis tours, some players are questioning the sport's heat policies.

Weather conditions have led to player complaints; mercury is likely to rise through to Sunday's Shanghai Masters final.

Every year players are pushed to their limits in a sport that chases the sun. But the number of retirements, withdrawals and injuries this season has been shocking