The number of fans allowed into the French Open has been cut to 1,000 per day after new coronavirus restrictions were imposed by the French government.
The French Tennis Federation said it "deeply regrets" the new restrictions.
The clay-court Grand Slam, which starts on Sunday, had originally been set to welcome around 11,500 fans each day before that number was cut to 5,000 last week amid rising Covid-19 cases.
The event is usually in May-June but was postponed because of the pandemic.
Spanish great Rafael Nadal will be seeking a record-extending 13th French Open singles title, which would draw him level with Switzerland's Roger Federer on 20 Grand Slam titles.