Leon Smith thinks Andy Murray will overcome his fatigue to play for Great Britain in next weekend's Davis Cup semi-final against Argentina.
Murray is in the five-man provisional squad with Kyle Edmund, Dan Evans, Jamie Murray and Dom Inglot, but there worries as to whether the Scot will be too tired to compete due to his continued participation at the US Open.
The 29-year-old made it through to the quarter-finals thanks to a comfortable 6-1, 6-2, 6-2 victory over Grigor Dimitrov in just two hours on Monday
Murray missed the Davis Cup quarter-final against Serbia earlier this year after winning Wimbledon, but Great Britain captain Smith says they will wait to assess the situation this time.
"We'll wait for the players to arrive in Glasgow and see what state they're in," Smith said.
"They've played a lot of tennis this summer. We'll see how Andy and Jamie fare here (at the US Open).
"We'll look at the make-up of the team to see if we stick with three singles players and one doubles player, or whether we bring in Dom. Those options are still very much open."
The Davis Cup clash against Argentina takes place just five days after the climax of the US Open, however, the hard courts at the Emirates Arena mean that Murray wouldn't have to contend with a change of surface.
"There's no doubt he will be tired," Smith said. "The toughest matches are ahead for him here and he's played so much over the summer.
"He's going to be tired but looking back to last year's Australia tie when he was clearly hurting and fatigued but went out and gave everything. I don't think that will change."