Rafael Nadal said on Tuesday that he will take part in the Madrid Open, raising doubts about whether he intends to defend his title at the US Open.
The US Open, whose fate still hangs in the balance, is scheduled to run from 31 August to 13 September on the hard courts of New York while the main draw at the Madrid event on clay starts on 14 September.
Madrid will serve as a warm-up for the rescheduled French Open, the clay court Grand Slam that begins on 20 September.
The Madrid tournament director Feliciano Lopez tweeted: "I have spoken to my friend Rafael Nadal who confirmed his participation in Madrid in September. As always, we await you with open arms in the Caja Magica!"
Nadal answered: "That's right Feli. See you in September in Madrid. Meanwhile everything is going well!"
The United States has seen a sharp resurgence of new coronavirus cases, leading to fresh doubts about whether the US Open will take place.
Leading players, including world No 3 Dominic Thiem, have said they expect a decision from US Open organisers this week.