Former world number seven Vaidišová returns four years after quitting tennis

Former tennis star Nicole Vaidišová is set to return to the sport later on Tuesday when she takes part in the first round of an International Tennis Federation tournament in the US city of Albuquerque. The one-time world number seven, who is 25, retired four years ago saying she had lost her love of tennis. Vaidišová said coming back would be a lot harder than starting out in the first place, describing the move as a step into the unknown.