"I've already said that I think what he's doing shows that he's a real driver," Villeneuve, the 1997 world champion and a past Indy 500 winner, told the Spanish daily AS.
Asked what he means by 'real driver', the French Canadian explained: "Well, all you have to do is listen to what other drivers have said about his decision.
"It sounds like excuses," Villeneuve added. "I think there are two classes of drivers. You're either an Alonso or you're a Rosberg. And Hulkenberg is a Rosberg."
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