Andy Murray admitted that it is going to be a tough balancing act between playing in the ATP World Tour Finals and then the Davis Cup final a week later, which both have different surfaces.
The Scot revealed that he has prioritised leading Great Britain in the Davis Cup final against Belgium on the clay courts of Ghent as the nation looks to win their first title since 1936.
With clay not being Murray's preferred surface, he has to put in a decent amount of practice time on the slower surface before the event.
However, the practice on clay will interrupt his preparations for the Tour Finals on the hard courts of the O2 Arena in London, where he has a chance to gain back his world number two spot from Roger Federer.
The finals conclude on November 22, while the Davis Cup final will be played from November 27-29, leaving Murray with a busy few weeks.
"It's going to be tricky," quipped the two-time grand slam winner on eurosport.co.uk.
"If I get injured in the next couple of days or something happens to my back then obviously I won't play [at the O2 Arena]. But if I'm fit and healthy and the next three days go well well then I'll be practising at the O2 from Friday.
"I've tried to juggle the two so that I don't have to miss the [Tour Finals] but also give myself a good chance of playing well in the Davis Cup. It's important I'm not too hard on myself and don't just expect to play great tennis at the start at the O2 as soon as I switch back to hard courts.
"I need to respect what the change to the clay can do to my body and also what it can do to your game because it's a completely different movement."