That’s the verdict of former Sauba, Ferrari and Williams driver Felipe Massa, who was runner-up in the drivers’ standings back in 2008.
Verstappen has been touted as one of F1’s top prospects since joining Red Bull from junior team Scuderia Toro Rosso two years ago.
And he’s been tipped to build on his three race wins to date by one day claiming the World Drivers’ Championship.
Verstappen could oust former Red Bull driver Sebastian Vettel and become the youngest man to ever win the F1 title.
Massa has now identified where the 20-year-old Dutchman must improve if he’s to taste glory though.
“I saw him make his debut at age 17,” Massa told Corriere Della Sera.
“Max is a great talent, but he still needs to improve something on the mental level.
“Last year he did some light things, things you can not afford if you fight for the World Cup.
“Here, I would like to see him run under even more pressure.”
Massa admits Max Verstappen could be motivated to improve by Red Bull team-mate Daniel Ricciardo.
“I like him a lot,” he added.
“Daniel is a spectacular driver and always takes important points home.
“Regularity is a fundamental value, Max perhaps can be inspired by his partner.”