However, the international break seems to have broken their flow as they were brought back down to earth by the ruthless Manchester City who ran out 5-0 winners.
De Bruyne told British media on Monday, "The guys who have come in have a very physical quality, they are very strong, very pacy".
In a Twitter debate with ex-striker Jay Bothroyd, the 40-year-old predicted that Senegalese forward Mane would score 20 league goals and win the golden boot award.
Gundogan has made a full recovery and was named in the match-day squad against Liverpool over the weekend but did not feature.
Ex-Liverpool centre-back Jamie Carragher took a different view, saying "he had his eyes on the ball, but that doesn't mean he isn't endangering an opponent". But after the sending off after they didn't seem to have any relation to each other, they were all over the joint. "It depends on the player".