However, it will be the final year the event is held in London, with it moving to Turin, Italy in 2021.
Former South African player Robbie Koenig agreed with Lester that winning the ATP Finals will be important to Nadal.
“Yeah [I agree],” Koenig replied.
“There was a chance that he might shut down the season after he won the French Open but the fact that he’s come back I think is testimony to what you’re saying right now.