Valentino Rossi wary of Max Verstappen threat at Portimao: "Big problem"

Two of motorsport's biggest drivers are about to share a grid this weekend, and they're both very wary of meeting each other during the race. Max Verstappen makes his GT World Challenge Europe debut at the Portimao season finale this weekend, but one of the 60-odd cars he will be racing will be driven by MotoGP legend Valentino Rossi. The nine-time motorcycle world champion has discussed with Sky Sport Italy how he feels about going up against the one of Formula 1's greatest drivers.

"It's going to be amazing. I mean, it will be a big problem because he’s sure to be incredibly fast, but it…