"Separated from Gael Monfils who hired Patrick Chamagne, Roger Rasheed announced that he would be Andy Murray's new coach. The Australian, who spent three years with the French, was also Lleyton Hewitt's coach in the 2000s."
Not exactly conclusive but it is a rumor that seems to have some weight online.
A few mentions of this on the internet with some saying it's true and others that it's pure speculation.
From TennisWorldUSA [11 July] -
Rumors are flying that Roger Rasheed might become Andy Murray's new full-time coach.
Rasheed split up with Gael Monfils over the weekend, and the experienced coach is already being courted by potential clients.
Murray has been without a coach for more than six months, though he has been working with Darren Cahill - who is friends with Rasheed - on a part-time basis.
There has been no official comment from anyone at this point.
The fact that Rasheed is friendly with Cahill means absolutely nothing since Cahill must be friendly with a lot of coaches. I believe Neil Harman. Whatever might happen re a coach in the future, for the moment it would seem that Andy is content with his present coaching arrangement. He feels comfortable with Cahill and respects and trusts him.