Belarus's Aryna Sabalenka returns the ball to Romania's Monica Niculescu during their first round women's singles match on day one of the Wimbledon Tennis Championships in London, Monday June 28, 2021. (AP Photo/Alastair Grant)

Belarus's Aryna Sabalenka returns a ball to Romania's Monica Niculescu during their first round women's singles match on day one of the Wimbledon Tennis Championships in London, Monday June 28, 2021. (AP Photo/Alastair Grant)