Thomaz Bellucci of Brazil in action against Pablo Cuevas of Uruguay during their men’s singles secod round match of the Rio 2016 Olympic Games Tennis events at the Olympic Tennis Centre in the Olympic Park in Rio de Janeiro, Brazil, 09 August 2016. EPA/MICHAEL REYNOLDS

Rafael Nadal (L) and Marc Lopez of Spain in action during the men’s doubles quartefinal match between Lopez/Nadal of Spain and Marach/Peya of Austria of the Rio 2016 Olympic Games Tennis events at the Olympic Tennis Centre in the Olympic Park in Rio de Janeiro, Brazil, 09 August 2016. EPA/MICHAEL REYNOLDS

Elina Svitolina of Ukraine celebrates after beating Serena Williams of the US in the women’s third round match of the Rio 2016 Olympic Games Tennis events at the Olympic Tennis Centre in the Olympic Park in Rio de Janeiro, Brazil, 09 August 2016. EPA/MICHAEL REYNOLDS

Angelique Kerber of Germany in action against Samantha Stosur of Australia during the women’s singles match of the Rio 2016 Olympic Games Tennis events at the Olympic Tennis Centre in the Olympic Park in Rio de Janeiro, Brazil, 09 August 2016. EPA/MICHAEL REYNOLDS

Volunteers use towels to dry off the Center Court during rainy weather at the Olympic Tennis Center in Rio de Janeiro, Brazil, 10 August 2016. Rio 2016 Olympic Games Tennis events have been delayed due to the weather. EPA/MICHAEL REYNOLDS