"We will complete all phases and wait until the end. For now, we can go there and start training. Day by day will tell us the possibilities you have of playing. On Saturday or Sunday, we will know," said Nadal's long-time doctor Angel Ruiz Cotorro.
Roberto Bautista Agut in line to replace Nadal
Although Nadal might have resumed training ahead of the ATP Finals, his participation is still not confirmed.
Notably, having not won this tournament to date, Nadal would desperately want to have a shot at the title, but not at the risk of his health.
Meanwhile, current world number nine, Roberto Bautista Agut is on standby to replace him, in case he rules himself out.