The other group game played at Bernabeu, Spanish champions, Real Madrid beat Apoel Nicosia 3-0 thank to a Cristiano Ronaldo brace and Sergio Ramos goal.
Due to the high competition in the Netherlands Championship, "Feyenoord" in recent years has rarely been able to qualify for the Champions League.
"Because David has won so many things during his career: the World Cup, the European Championship, the Premier League twice, the FA Cup, League Cup". It is only helping me, working with them day in, day out.
The Catalan - whose club have gone beyond the last 16 only once in the last six seasons - asked John Stones how many Champions League games he had played - "ten maybe", the defender replied - to demonstrate that Barcelona and Bayern players have greater experience.
After a thumping win over Feyenoord, the FC crew assess the skill ceiling that Man City possess, and their stellar squad.
Man City, up against Dutch champions Feyenoord, scored after just 90 seconds into the game thanks to a John Stones header.
This is the club's sixth successive Champions League campaign but they are still to really come of age in the competition despite reaching the semi-finals in 2016 and then bringing in two-time winning manager Guardiola.
They were rewarded with a third goal when in-form forward Jesus tapped home after Benjamin Mendy's fierce drive from outside the box was only parried by Feyenoord goalkeeper Brad Jones. Bernardo Silva is likely to prove just as moveable: he started off as a number 10, played on the right wing at times for Monaco and for Portugal and has even played on the left, too, although he does not enjoy it as much. "He was so important last season".
Pep Guardiola revealed Vincent Kompany is back in training ahead of City's trip to Watford.
Having survived the remaining 20 minutes of the first half, Feyenoord introduced creative midfielder Jens Toornstra at half-time - the 29-year-old involved in 24 goals in the Eredivisie last season - but the Dutchman was unable to prevent City extending their lead.
He said: "Three points are very important to start the group stage".
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