Andy Murray is to continue working with new coach Jonas Bjorkman until at least the end of the US Open.
Swede Bjorkman linked up with world number three Murray last month, initially on a five-week trial.
Murray's main coach is Amelie Mauresmo, but the Frenchwoman does not work with the two-time grand slam winner through the whole year and is expecting her first child in August.
Bjorkman, a former world number four, will take on a more prominent role with Murray through Wimbledon and then the hard-court season.
"After Wimbledon, providing everything is good, I'm going to spend the whole of the hard-court stretch through to the end of the US Open with Jonas," Murray, who will link up with Bjorkman at the BMW Open this week, said.
"Then I'll see what happens with Amelie because I don't think she knows what her priorities are going to be and how she wants to deal with things, so we'll just see for a few months."
On what Bjorkman brings to his coaching set-up, Murray added: "He's a very calm guy, he's not in your face, but when he talks you listen.
"Sometimes if someone talks all the time you don't listen to most of the stuff. But when he talks you listen to him.
"He's got a very nice way about him, he's easy-going. But he was mentally very strong and had a great work ethic as well, so hopefully that can rub off on me and the team as well."
The form of Novak Djokovic, meanwhile, has led Murray to suggest the world number one is the favourite for this year's French Open, rather than Rafael Nadal.
In 10 appearances at Roland Garros, Nadal has lifted the title on nine occasions, but the Spaniard has struggled to find his best form at the beginning of the 2015 clay-court season.
"A lot can change in tennis but I'd say right now Novak is the favourite, which hasn't been the case for many years with Rafa's record in the French," said Murray.
"In the two times I've made it to the semi-finals of the French Open I've lost to Rafa and he was playing really great tennis both of the times. So if his game isn't quite there then [that] obviously increases my chances a little bit."