The premier class was monopolized by Pirelli riders, steering their factory machines using Scorpion MidSoft 32 front and rear. All three podium positions were captured. Surprisingly, Clement Desalle took the overall win. He made a late decision to race in Portugal after suffering a dislocated shoulder in Holland two weeks ago but was victorious thanks to a brace of second-positions. The works Suzuki rider defeated world championship leader Antonio Cairoli, who was fifth in the first moto after a bad start but retaliated to win the second race. The rostrum was completed by the Sicilian's team-mate Max Nagl. The German raced away with the first outing but was slow to build his rhythm in the second sprint and could only finish fifth. Yamaha Monster Energy rider David Philippaerts was fifth overall and suffered a fall in the first moto. Afterwards he took third but suffered an injury to his left hand and was not in the same shape during the second race, registering eighth by the flag. The day was not a complete disaster for the Italian as he was able to rise to third in the championship thanks to his points haul, behind Nagl and Cairoli.