Manchester City suffered late heartbreak, as an injury time leveller from Gabriel Martinelli earned Arsenal a point at the Emirates Stadium.The Blues took an early lead through Erling Haaland’s inevitable goal, but spent most of the rest of the game defending against wave after wave of Arsenal attack.City largely kept Arsenal at bay, limiting them to two shots on target across the full game, before their old enemy of a long ball over the top caught out the backline and allowed Martinelli to lob the ball over a stranded Gianluigi Donnarumma and into the net.That means seven points from three very tough games in a week, so is nonetheless an encouraging sign despite late disappointment.Here are three things we learned from the draw in North London:The full back conundrum is solved for nowCity were fantastic yesterday, and in many ways deserved three points. It was a spirited, determined performance, epitomised by Abdukodir Khusanov and Nico O’Reilly.The Uzbekistan international kept Leandro Trossard in his pocket in the first half. He senses danger, times his tackles supremely well and is super composed and crisp with his actions.He went off at half time injured, and let’s give Matheus Nunes credit, because he came on and played well.But Khusanov has proven himself to be City’s best right back and we can only hope that his injury isn’t in any way serious.And on the other side, O’Reilly might well have been my man of the match. He reads the game exceptionally well and is a strong, intelligent defender.The greatest compliment that can be given to him is that Rayan Ait-Nouti – City’s new £35 million signing from Wolves – will have a fight on his hands to win his place back in the team.Pep is becoming a pragmatistNever, ever, did I think I’d see a City performance under Pep Guardiola with just 32% possession.City clearly sensed that Arsenal’s midfield trio of Declan Rice, Mikel Merino and Martin Zubimendi would be nowhere near creative enough to break down a deep defence, whilst Haaland and Jeremy Doku at the other end could lead the Blues forward on the counter.That was how Haaland’s goal was scored; a scrap in midfield broke to the Norwegian, who flicked it to Tijjani Reijnders and zoomed forward into space.Reijnders carried the ball forward and waited to play the pass at the perfect moment to Haaland, who finished emphatically.It was initially surprising to see, but in some ways it wasn’t so. Haaland suits a transition game, and so does Doku. Reijnders also does in terms of attacking, but needs to improve with duel winning (I’m sure he will.)The backline, mostly Ruben Dias, thrive in sitting deep and defending, whilst Donnarumma can cope with being put under pressure as arguably the best shot stopping goalkeeper in the world.It makes sense that Guardiola is adapting to suit what he has in front of him, particularly after a trophyless season last year.He likes a fluid, possession based system, but ultimately Guardiola’s priority has always been to win.There’s an amazing core to this squadI don’t think many people would argue with the assertion that City have the best goalkeeper, left footed centre back, defensive midfielder and striker in the Premier League, if not the world.To get back to their top level, City just need to build around these players with quality and give them time to gel as a team.And they’re already doing that.Reijnders has the potential to be an elite quality eight, and Phil Foden has certainly shown he’s good enough as a ten.Rayan Cherki is an elite talent who just needs to adapt, Doku is coming to fruition and the likes of Omar Marmoush, Khusanov and Nico Gonzalez are clearly useful players.From the academy, Oscar Bobb, Rico Lewis and O’Reilly are at the very least useful squad players. James Trafford is a good backup goalkeeper, Rayan Ait-Nouri is an excellent attacking left back and the older players in Mateo Kovacic, Nathan Ake, John Stones and Bernardo Silva will be phased out in the next two seasons, but still have a lot to give.I don’t think we’ll see the absolute best of City this season, due to the adaptation process of so many new players at once. But I don’t doubt that this group of players under Guardiola will compete for and win another Premier League before the Catalan leaves the shores of England.