Arne Slot says Liverpool defender Amara Nallo must learn from his “cruel” red card in Wednesday’s 3-2 defeat to PSV Eindhoven in the Champions League. The academy graduate’s first-team debut lasted just four minutes at Philips Stadion as he was sent off late in the second half for a professional foul on Johan Bakayoko.

Amara Nallo endured a nightmare Liverpool debut as he was sent off for a last-man challenge shortly after coming as a second-half substitute for fellow youngster Jayden Danns

Liverpool was in the luxurious position of being able to play the kids in its final game of the Champions League’s revamped first stage, with qualification already secure. Nallo, an 18-year-old defender,