Boris Becker says Dominic Thiem needs to learn how to feed from pressure as a way to deal with it.
Thiem has been open about his mental struggles since winning the US Open, with him having a very poor start to the year by his usual high standards.
The Austrian lost in the fourth round of the Australian Open before early exits in Doha and Dubai.
After those losses he withdrew from Miami, Monte-Carlo, and Belgrade due to a knee injury.
He has also spoken of how winning the US Open last year has affected him in terms of his motivation as he has struggled to refocus his goals.
Becker, though, believes Thiem is not showing much of a champion's mindset, and that is the thing he needs to change to get himself back on track.
"If you've won your first Grand Slam tournament, you've tasted blood and you're hot for the next title," Becker told a Eurosport Germany podcast.
"Now the environment is required, which has to make it clear to him: 'Boy, you are one of the top favourites in Paris'.
"At 27, Dominic is in the prime of tennis, but needs a different approach to better deal with pressure.
"I have never heard the word 'pressure' from the mouths of Roger Federer, Rafael Nadal or Novak Djokovic - although they should have some permanent pressure because of their success."
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