Despite last season's stunning achievements, Guardiola was his usual guarded self when talking about City's prospects for the year ahead, believing as many as five other teams could prevent him from becoming the first manager in a decade to retain the title.
Emery will take charge of the Gunners in a competitive match for the first time on Sunday afternoon when the Premier League champions travel to the Emirates Stadium.
This was Pep Guardiola's 11th meeting with Emery and he remains unbeaten against his fellow Spaniard as Raheem Sterling's 50th Premier League goal got the ball rolling before Bernardo Silva struck in the second half. "There was a gap last season but this season I don't know". The Welshman just returned to training at the end of the week.
The future is bright, the future is Unai Emery (below).
A Golden Boot victor in the Bundesliga, Emery admits that he expects his striker to be in contention for the Premier League gone this season, saying: "Yes, I want strikers who have the possibilities to go for goal, I want to give them more options to attack".
The former Sevilla and Paris Saint-Germain manager handed starts to two of his summer arrivals as Sokratis Papastathopoulos lined up alongside Shkodran Mustafi at the heart of the defence while Matteo Guendouzi was given his Premier League bow in midfield.
"It is impossible to have the season all the time that is ideal".
Sadio Mane netted in first-half stoppage time and eight minutes after the break. But I don't think we were fearless enough early on.
"We are excited", he said. Arsenal were given a hiding in this fixture a few months back, losing 3-0 on an absolutely freezing night in front of a paltry crowd that pretty much summed up where they were back then.
Arsenal's defensive signings will give their forward players more freedom and Aubameyang is one to exploit this and torment the opposition. You've got to have the nous, understand what's happening and make changes to turn it your way.
"We're keeping a lot of the good ideas that were working here but improving tactics with my ideas and spirit and energy, while together creating anew way, a new process at Arsenal".