Joao Fonseca defeated Matteo Berrettini 6-3, 6-2 in the Monte Carlo Masters Round of 16 on clay on 9 April 2026, confirming his status as the pre-match favourite with odds of 1.63 to Berrettini's 2.24. The Brazilian's commanding performance saw him secure the first set by a break before extending his advantage in the second, where a further service break proved decisive in reaching the quarter-finals. Berrettini, returning to form on his preferred surface after recent struggles, could not maintain the consistency required against Fonseca's aggressive baseline play and court positioning. The victory underscores Fonseca's growing credentials on clay and suggests momentum building towards the French Open.