Olympiacos Piraeus vs FC Porto 10/27/2020
A fan wearing a face mask sits alone on the stands before the start of the Champions League group C soccer match between FC Porto and Olympiacos at the Dragao stadium in Porto, Portugal, Tuesday, Oct. 27, 2020. Only 3,750 fans were allowed on the stands. (Miguel Riopa, Pool via AP)

A fan wearing a face mask sits alone on the stands before the start of the Champions League group C soccer match between FC Porto and Olympiacos at the Dragao stadium in Porto, Portugal, Tuesday, Oct. 27, 2020. Only 3,750 fans were allowed on the stands. (Miguel Riopa, Pool via AP)

Oct. 27, 2020 04:00 PM EDT