It all went wrong for Ajax in the final phase of the match. Ryan Gravenberch got his second yellow card in the 79th minute, and minutes later Luis Muriel scored the game's only goal.
Ajax – Atalanta 0-1 (0-0)
85. Muriel 0-1
Red card: 85. Gravenberch (Ajax)
Ajax: Onana, Mazraoui, Schuurs, Martínez (90+1. Timber, 90+4. Álvarez), Tagliafico (63. Huntelaar), Gravenberch, Klaassen, Labyad (63. Ekkelenkamp), Antony, Brobbey (46. Promes), Tadic