Many believe that Rosberg already has one hand on the championship trophy, but Wehrlein, who is racing for Monor this season, has said that writing either driver off would be a mistake.
"Both Mercedes drivers are geniuses in their own way," the 21-year-old told Speed Week. "I said it this way: one of them may be written off, but as soon as one of seems beaten, the other one has come back."
"So let's see how it turns out. For me, I think it's very, very exciting at the moment because of the way it goes back and forth between them," he added. "Unfortunately Lewis has been unlucky a few times, and it's not easy to make up those points, but as I said, neither of them can be underestimated."
Bahrain International Circuit - Winter testing
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