Laura Robson has responded to criticism from her former coach that she lacks commitment to tennis.
British No 1 Robson defeated Kim Clijsters and Li Na to reach the fourth round of the US Open under the guidance of Zeljko Krajan last year.
But she split from the Croat in early May, prompting Krajan to accuse the 19-year-old of lacking maturity and being unwilling to work hard enough.
Robson told Sky Sports News: "I think I'm pretty committed and think he (Krajan) just comes from a very different environment.
"He's someone that just wants to be on court for eight hours a day. Our personalities were too different."
Robson, the world No 37, will work with Andy Murray's former coach Miles Maclagan on a trial basis during the upcoming grasscourt season.
"I've always really respected his views on the game and I always enjoy his (TV) commentary and got to know him a little bit when he was working with Andy.
"I just thought it would be a good fit for the next couple of weeks."
Robson will start her grasscourt campaign at the AEGON Classic in Birmingham, which takes place from June 10-16.