Movistar Yamaha MotoGP's Maverick Viales and Valentino Rossi faced the hot and especially humid conditions on the first day of the Malaysia Motorcycle Grand Prix weekend. The riders had to show some patience in the morning, waiting for the track to dry, before getting fully immersed into FP1. In the afternoon, they had to cope with completely different circumstances at a full wet Sepang International Circuit. The teammates ultimately finished 4th and 12th in the combined Friday free practice results.