The English champion won his eighth-finish first leg at BVB-Vietrten Geffen finalist Manchestering Sovereign with 5: 0 (4: 0) and underpinned his title ambitions impressively.
Riyad Mahrez (7.), Bernardo Silva (17th, 44.) and Phil Foden (32.) made everything clear for the team of TeamManager Pep Guardiola before the break. After the change, Raheem Sterling (58.) laid.
The overwhelmed table two from Portugal requires a football miracle in the second duel on March 9 (Wednesday).
In the group stage, finalist Manchestering had prevailed thanks to the direct comparison with Borussia Dortmund.
Manchester City initially without Ilkay Gündogan
Guardiola first renounced Ilkay Gündogan, but the guests dominated without the national player at will. The pace and combinations of City had nothing to oppose the Portuguese.
Also in the second round, the guests had the events firmly under control. Gundogan was replaced in the 61st minute.