Heather Watson of Great Britain returns the ball to Sara Errani of Italy during their first round match for the Italian Open Tennis Tournament at the Foro Italico, in Rome, Italy, 09 May 2016. EPA/CLAUDIO ONORATI

Milos Raonic of Canada returns the ball to Marco Cecchinato of Italy during their first round match of the Italian Open tennis tournament at the Foro Italico, in Rome, Italy, 09 May 2016. EPA/ETTORE FERRARI

Vasek Pospisil of Canada serves the ball to Andreas Seppi of Italy during their first round match for the Italian Open Tennis Tournament at the Foro Italico, in Rome, Italy, 09 May 2016. EPA/CLAUDIO ONORATI

Barbora Strycova of the Czech Republic returns the ball to Karin Knapp of Italy during their first round match of the Italian Open Tennis Tournament at the Foro Italico, in Rome, Italy, 09 May 2016. EPA/CLAUDIO ONORATI

Lucie Safarova of the Czech Republic returns the ball to Italian Francesca Schiavone during their first round match for the Italian Open tennis tournament at the Foro Italico in Rome, Italy, 09 May 2016. EPA/ETTORE FERRARI