Darren Cahill has ruled out becoming Andy Murray's full-time coach, but has left open the possibility of working with Murray on a partial basis.

"...it depends what he wants, if he's looking to add a consultant or a part-time coach or a full-time coach," Cahill said on ESPN, while doing commentary during Murray's semifinal match in Los Angeles against Feliciano Lopez.

"I'm not sure, but it looks like he's leaning towards employing a full-time coach, and that can't be me. I'm not in a position to be anybody's full-time coach with my commitments here at ESPN and also as a consultant for adidas."

Cahill, a coach with adidas' player development program, has served as a consultant for several pros sponsored by the clothing company. Murray, who is also sponsored by adidas, could thus work with Cahill through the program.

But the Scot expressed reservations about sharing a coach when speaking with reporters in Los Angeles this week. "I haven’t spoken with Darren," he added. "I'd probably want to work with someone like that, but he has a lot of things going on himself so I have no idea."

But Cahill, who explored a coaching relationship with Roger Federer last year, reiterated that he would not take on a full-time role.

"I think the world of Andy and I think he's a major winner in the waiting," said the Las Vegas-based Australian coach. "But if I was going to go back to full-time coaching, I'd probably would have hung in there with Roger, seeing whether Roger offered me the job."