Spectators with face masks watch the first round match of the French Open tennis tournament between Belgium's David Goffin and Italy's Jannik Sinner at the Roland Garros stadium in Paris, France, Sunday, Sept. 27, 2020. (AP Photo/Christophe Ena)

Spain's Rafael Nadal wears a face mask during a break in the first round match of the French Open tennis tournament against Egor Gerasimov of Belarus at the Roland Garros stadium in Paris, France, Monday, Sept. 28, 2020. (AP Photo/Alessandra Tarantino)

Karolina Pliskova of the Czech Republic reacts after losing a point against Egypt's Mayar Sherif in the first round match of the French Open tennis tournament at the Roland Garros stadium in Paris, France, Tuesday, Sept. 29, 2020. (AP Photo/Michel Euler)

The image on a billboard of spectators with straw hats walking the sunny lanes of the Roland Garros grounds contrasts with the changed reality as spectators with face mask walk under damp and cold conditions during first round matches of the French Open tennis tournament at the Roland Garros stadium in Paris, France, Sunday, Sept. 27, 2020. (AP Photo/Alessandra Tarantino)

A lone spectator watches Italy's Matteo Berrettini and Canada's Vasek Pospisil in the first round match of the French Open tennis tournament at Suzanne Lenglen court of the Roland Garros stadium in Paris, France, Tuesday, Sept. 29, 2020. (AP Photo/Christophe Ena)

Canada's Vasek Pospisil plays a shot against Italy's Matteo Berrettini in the first round match of the French Open tennis tournament at the Roland Garros stadium in Paris, France, Tuesday, Sept. 29, 2020. (AP Photo/Christophe Ena)