Emery has faced a Guardiola side 10 times and never won.
Today, City are arguably Premier League's best bet to win the UEFA Champions League, their scintillating football from last season still fresh in the minds of the spectators and for the first time since 2009, the Premier League defending champions remain the favourites to retain the title.
Guardiola's side might become more technical at the back this season, with Aymeric Laporte and John Stones seemingly his first-choice combination, with the more rugged Vincent Kompany and Nicolas Otamendi back-ups. Arsenal must watch long balls over the top, however - Aguero has punished them in that manner in the past, particularly in this year's Carabao Cup final. Arsenal are other contenders too.
Instead, he has told his players to use their form of a year ago - in which they also set records for most points, wins and goals in the Premier League era - to launch another championship charge. You can not say they are not contenders to win.
City were almost ideal last time out, winning the league with a record number of points (100), goals (106) and points margin (19). The pair missed last week's Community Shield after taking delayed summer breaks following the World Cup. "There was a gap last season but this season I don't know".
"I have a lot of respect for his career, starting from the bottom and making an excellent career, winning titles and making his teams hard".
Midfielders Kevin De Bruyne and Raheem Sterling are back in contention for Manchester City's Premier League opener at Arsenal. The principles are there. "I'm happy for them", Mourinho told Sky Sports. "What we have done last season, now [people say] we are going to win [again] - nobody can assure me of that". Nobody can assure me of that. But we're starting a new way, a new process with the same players and the new players, the new coaches.
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Surprisingly, newly-promoted Fulham was third on the highest spenders' list with 105.3 million euros spent on seven players. Due to the British transfer window closing early this season, the Gunners can not now add any new players to their squad.
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Xherdan Shaqiri has sounded a Kop battle cry, claiming "nothing is impossible" for Liverpool this season. More aggressive in the right moments. "That is the case and a fact".
But winning helps to win more.
So there we go.
It might be a while before the Emery revolution bears fruit, but his attention to detail and desire for a high-tempo pressing game should make Arsenal a tougher unit than Wenger's skillful but spineless group.
"Or Manchester United. People ask how will they do, but I know a little bit about the manager and in that situation how good they handle that".
He is so intelligent.
"I like to work with these guys, I enjoy it". He always makes his teams hard.
"Now he is at Arsenal, one of the best teams in England, and of course he is a contender to win titles".