Matteo Berrettini withdrew from the Montecarlo tournament, the third Master 1000 of the season, due to a second degree injury to the oblique abdominals.
The Roman tennis player announced it on Instagram.
"I don't know where to start... I was finally finding my level and getting back to where I wanted to be... this is difficult", the place of Berrettini, who has suffered several injuries in the last year.
In the afternoon he should have faced the Danish Rune in the round of 16.