City progress through to the quarter-finals with a 4-0 aggregate win over Gladbach after beating them 2-0 in the second leg.
They controlled the game but secured the win in the first half, with De Bruyne opening the scoring with a great strike into the top corner from the edge of the box that gave Sommer no chance.
Gundogan then doubled the lead six minutes later, hitting his low shot under the goalkeeper and into the far bottom corner.
Gladbach were restricted to a couple of chances, both falling to the lively Breel Embolo.
As the clock ticked past the hour mark, nine of City’s 11 players boasted a pass completion rate of more than 90 per cent.
Who you play does not always matter, those numbers suggest a thorough dedication to the task at hand.
City is in the quarter-final draw but will have to wait until Friday to find out who they’ll be facing in the next round. Their attention turns to the FA Cup quarter-final now when they travel to Everton at the weekend.
As for Gladbach, they’re now winless in nine, losing the last seven in a row and Rose will be hoping they can turn that around against struggling Schalke in the Bundesliga.