PORTO, PORTUGAL - FEBRUARY 13: Diogo Costa of FC Porto warms up prior to the Liga NOS match between FC Porto and Boavista FC at Estadio do Dragao on February 13, 2021 in Porto, Portugal. Sporting stadiums around Portugal remain under strict restrictions due to the Coronavirus Pandemic as Government social distancing laws prohibit fans inside venues resulting in games being played behind closed doors. (Photo by Jose Manuel Alvarez/Quality Sport Images/Getty Images)