Fans are seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday. (Photos: Xinhua)

Fans are seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

A fan wearing a face mask is seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

A fan wearing a face mask is seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

Fans are seen in the Deutsche Bank Park during a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

Fans are seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

Fans walk to the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

Fans are seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.

Fans are seen in the Deutsche Bank Park prior to a German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt, Germany, Sept. 19, 2020. About 6,500 fans were permitted to enter the stadium to watch the German Bundesliga match between Eintracht Frankfurt and Arminia Bielefeld in Frankfurt on Saturday.