Argentina's World Cup-winning coach Cesar Luis Menotti has taken another dig at Barcelona star Lionel Messi.

With the Copa America looming, Menotti has again questioned Messi's commitment to his country.

"I'm sure that Messi is happy in the Argentina national team," Menotti said.

"It wouldn't cost him anything to say that his big toe hurt if he didn't feel like it, but if he's with us it's because he's happy to do it.

"I don't think there's anyone who wants to win more than Messi does with Argentina. If there is, I haven't spoken to him.

"But I'm sure if you asked Messi if he'd rather be a champion with Argentina or win the Champions League, he would say the Champions League."