Andy Murray may not be participating at the ATP Finals, but the three-time grand slam champion has taken to the court at the O2 Arena as he continues his comeback from injury.
Murray has been absent from tournament action since Wimbledon due to a long-standing hip problem, slumping to No.16 in the world rankings as a result of his inactivity having begun the year at No.1.
However, after featuring in an exhibition match with Roger Federer in Glasgow this week, the Briton was able to help out Dominic Thiem ahead of the season's lucrative final event.
Thiem begins his ATP Finals campaign against Grigor Dimitrov on Tuesday (AEDT) and was joined by Murray on the O2's Centre Court for a practice session.
Fans of Murray, who is targeting a January return, will hope it is not long before he is back in competitive action.