On 5 April 2019, Keïta scored his first goal for Liverpool in a 3–1 win against Southampton, and added a first European goal four days later against FC Porto in the UEFA Champions League quarter-final first leg. He was injured in May 2019, ruling him out for the rest of the season. Although Keïta was injured, he won his first Liverpool title while out of the matchday squad as his team mates secured the win in the Champions League final against Tottenham Hotspur in early June.