Luton did not find any solutions for the Norwegian striker, who scored his eighth hat-trick with City before the end of the first half, then scored two more goals after the break, eliminating any hope for Luton to return to the result.

Kevin De Bruyne created all of the first four goals for Haaland (23 years old).

Mateo Kovacic also scored for City, the defending champion, who had not lost in 18 matches in all competitions.

Luton threatened an unexpected comeback when Jordan Clark scored brilliantly at the end of the first half and scored again early in the second half to make it 3-2, but the powerful City fought their way to the quarter-finals.

The only thing that dampened the joy of City, which will face Manchester United in the English Premier League on Sunday, is the injury of Jack Grealish, who was forced to leave in the first half.