At the end of his first season with Manchester City, despite having "limited playing time" (including just 14 league starts), Mahrez won the Premier League title for the second time, and his first with Manchester City, becoming the second African player to win the title with two different clubs after Kolo Touré. Mahrez said he would not leave City despite his lack of game time, claiming that he knew his first season would be difficult and he had come to a stable team with good players but he trusted his potential. A week after in the FA Cup final, he achieved his fourth title of the season after beating Watford 6–0 becoming the first African player to complete an English domestic treble, as he earlier won the 2018–19 EFL Cup and the 2018–19 Premier League.