Rafael Nadal revealed he was not worried at all about contracting Covid-19 from Daniil Medvedev following a practice session.
Nadal and Medvedev practised on Monday and the following day the latter was withdrawn from the Monte Carlo Masters after he returned a positive Covid-19 result.
The world No 2 went into isolation and is being monitored by ATP medical staff as a precaution.
Nadal downplayed concerns that he was in danger of also missing the tournament after coming into contact with Medvedev, but the Spaniard says he kept his distance.
"I was not worried because I practised with him, but I was never close to him," the world No 3 said after his 6-1, 6-2 win over Argentina's Federico Delbonis on Wednesday.
"Of course, when this kind of stuff happens, it's not good. But I felt sorry for him more than for me because, well, anything can happen.
"As much as I know about the way that you can be infected was not the way that I was supposed to be infected practising with Daniil because I never have been in touch with him.
"Never have been closer than four meters, something like that. Just at the end to say thanks for one second."