Photo taken on June 15, 2018 shows a bar decorated with national flags in Zagreb, capital of Croatia, on June 15, 2018. Croatia will face Nigeria in its first FIFA World Cup 2018 match on June 16 local time. (Xinhua/Sanjin Strukic)

Photo taken on June 15, 2018 shows temporary tents for world cup fans on Ban Josip Jelacic Square in Zagreb, capital of Croatia, on June 15, 2018. Croatia will face Nigeria in its first FIFA World Cup 2018 match on June 16 local time. (Xinhua/Sanjin Strukic)

A gibbon is "predicting" the winner of upcoming FIFA World Cup match between Croatia and Nigeria at a zoo in Zagreb, capital of Croatia, on June 15, 2018. (Xinhua/Davor Visnjic)

A woman displays a banner at a fan shop in Zagreb, capital of Croatia, on June 15, 2018. Croatia will face Nigeria in its first FIFA World Cup 2018 match on June 16 local time. (Xinhua/Sanjin Strukic)