McLaren driver Juan Pablo Montoya has criticised his former boss Frank Williams for not supporting him enough and calling him overweight.
Juan Pablo Montoya joined McLaren from Williams
Speaking before his McLaren race debut in Melbourne on Sunday, he also added that he felt undervalued by Williams.
"I don't know what they wanted. I was winning races. He just complained I was overweight and unfit and just whinged about it," the Colombian said.
Montoya joined Finn Kimi Raikkonen at McLaren after four seasons at Williams.
"Frank always complained that I was overweight. When I got into Formula One everyone said I was fat, " said Montoya.
"I weighed less then than I do now.
"It's pretty demotivating. I thought I was working pretty hard - and someone goes and says that."
The Colombian added that he felt more positive now he was at McLaren.
"At BMW Williams they expect you to get the things done - here at Mercedes and McLaren they give you the tools to do the things.
"It makes a big difference for the driver - the driver is a lot more appreciated," said Montoya.
The F1 season starts with the Australian Grand Prix in Melbourne on Sunday.