Stefanos Tsitsipas, the fourth seed at the Monte-Carlo Masters 1000, qualified for the semifinals after the retirement of his quarterfinal rival, Alejandro Davidovich, who had beaten 7-5 in the first round.
Davidovich injured his left thigh as the scoreboard reflected a tie at three. Until then he had made a good profit from his parallel setback and had taken the initiative of the match, without shrinking against the fifth player in the world.
After the sixth game, the Spaniard requested the services of the physiotherapist, who examined and massaged his leg while Davidovich made gestures of pain.
Despite this, he returned to the court and then broke the Greek’s serve, which had cooled during the interruption. Tsitsipas immediately returned the coin to the Spaniard (5-4), physically depleted and who resorted to touches and drops to save travel on the court.
After losing the set 7-5, Davidovich, 58 in the ATP ranking, opted for retirement.