He has now scored five goals in six opening day matches for City.
"Because I don't think last season the players he had were the type of players that he wanted so you have to rebuild the team around his project and the way he wants to play - it's a tough job for him". Even then, Brighton looked likely of getting a goal of their own.
Man City qualified for the Champions League this season but Guardiola failed to pick up any silverware in his first season in the Premier League.
"They have top players, but it is just 11 v 11 on the pitch and we need them to be uncomfortable", the 36-year-old Spanish right-back told the club's website.
But after a close-season in which both managers have invested heavily in new players, United are now Mourinho's team and City have been created by Guardiola.
Brighton was successfully repelling City's potent strike force until a costly lapse.
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"They were very good offensively last season and everybody could see defensively that's where the problem was".
City penned Albion back for large parts of the first half and Albion's game plan was thrown into disarray by the early injury to Izzy Brown. City played the patient, technical passing football with which the Catalan made his name, and his starting lineup was adventurous; Sergio Aguero and Gabriel Jesus started together ahead of twinned playmakers De Bruyne and Silva.
The focus may have been on Manchester last season, but the title went to the capital and the run-in was a battle between two London clubs. Jenas believes that City are favourites but that they must win something with the quality that they have got. "People say we are a big team but we run like a League One or a Conference team". We can try to beat them, what a thrill that will be for us.
And City started the campaign with a comprehensive 2-0 win over newly promoted Brighton, with only Mendy not featuring of the new boys - Sergio Aguero and a Lewis Dunk own goal sealing all three points.
"We attacked too slowly we have to be a little bit quicker and a little bit more precise with more accuracy in our passes".