Andy Murray's relationship with Brad Gilbert was always destined to be a short one, according to the British number one's former coach Mark Petchey.
Murray announced his split with Gilbert on Wednesday
Murray's split with Gilbert came only 16 months after the American replaced Petchey as his coach.
"Andy is strong-willed and ambitious," Petchey told BBC Sport.
"Brad is very talkative and passionate. When you have those sorts of characters the relationship is never going to have longevity because it is so intense."
Announcing his decision, Murray said he would now look to appoint "a team of experts each to fulfil a specified role".
I think there will be a few coaches out there that would probably think twice about taking that job
Canadian Louis Cayer, who has been working with Murray's brother Jamie, and Leon Smith, his former coach, have been touted as possible replacements for Gilbert - at least in the short-term.
Petchey believes Murray needs a motivator more than a tactician.
"That was always the challenge with Andy when I worked with him. He is a player that understands the game unbelievably well," he said.
"He doesn't need a brilliant tactician but he probably needs a great motivator, somebody that can keep it fresh and help him the best out of himself.
"I know he thinks very highly of Louis Cayer or maybe he'll go back to Leon Smith for a bit. I think that will be the type of move he makes for a while and he'll see how it pans out."
However, Petchey warned that Murray may find it difficult to lure a big-name coach.
During his spell with Gilbert, the 20-year-old frequently directed verbal outbursts at his coach in the stands when events went against him.
In his semi-final defeat to Roddick in Cincinatti last year, the Scot was heard to shout at Gilbert: "You're giving me nothing. I'm dying out here."
Petchey said: "The fire that burns inside him is big but I think there will be a few coaches out there that would probably think twice about taking that job.
"I think you have to be a very strong character to be willing to put up with that. People who don't need the money and the job would obviously think 'do I need it that bad?'
"But I don't think he will struggle to find a new coach because he's such a great talent and he is going to be such a great champion, he'll find somebody that will fit in."