Although this was just a semi-final, Chelseas tie against Manchester City at Wembley felt like the biggest match of the 2020/21 FA Cup.This was partly because the other semi-final involved Leicester City and Southampton, who were certainly not close to either of these sides on the form table.Another intriguing undertone was that Pep Guardiola and Thomas Tuchel (who cites the ex-Barcelona manager as an inspiration) were meeting on an English pitch for the first time.Both sides were involved in the UEFA Champions League quarterfinal ties in midweek, and both progre sed by beating Porto and Boru sia Dortmund on aggregate respectively, although Chelsea did lose on the night. Before that, though, the Blues had beaten Crystal Palace in the Premier League by putting four past them, while a depleted City side succumbed to a 1-2 defeat against 10-man Leeds United. Therefore, two teams who had been near-perfect of late entered this match in stuttering form.Chelsea emerged deserved 1-0 winners as Hakim Ziyechs second-half strike ensured a place in the final for Tuchels side. In this analysis, we will attempt to break down how the Blues pulled off this important victory, while also focusing on some of Citys struggles.Manchester Citys pre sCity were very clear with their approach out of po se sion, as they pre sed Chelsea high up the David Njoku Jersey pitch from kick-off.The very first action of the match saw Gabriel Jesus pre s Thiago Silva, who played the ball back to Kepa Arrizabalaga. The keeper was also pre surised by the Brazilian striker, so he had to punt the ball away aimle sly, allowing City to turn po se sion over easily.This was a key part of Citys plan getting the ball to the Chelsea goalkeeper and putting him under pre sure to force him to put a foot through it but they did not really get too much joy out of it after the opening stages as Kepa attempted only three chipped long pa ses from open play after the fifth minute of the match.City pre sed Chelseas 3-2 build-up shape using the front-four of their formation. Jesus was tasked with chasing Silva down, while the two wingers Raheem Sterling and Ferran Torres stayed close to the two wide centre-backs Csar Azpilicueta and Antonio Rdiger respectively.Kevin De Bruyne marked either Jorginho or NGolo Kant, while he was supported by a winger (Sterling in this case) for the other Chelsea midfielder.The two Chelsea wing-backs were pre sed by Citys full-backs, who pushed high up the pitch to do so.Here, you can see Benjamin Mendy coming forward to close down Reece Jamesand here, Sione Takitaki Jersey Joo Cancelo has pushed forward to stay tight to Ben Chilwell.City were running quite a risk by pre sing Chelsea in this manner, and they were left exposed in transition a number of times.Their main weakne s was De Bruyne against two Chelsea midfielders, which made the Belgian internationals task quite difficult. The fact that City were operating with two defensive midfielders meant that if the 29-year-old creator lost one of Chelseas double pivot, he would have a lot of space in the middle of the park.In this case, De Bruyne goes to close Jorginho down, leaving Kant free in the proce s. Chelsea just need to string two simple pa ses together to find the Frenchman in a lot of space.The ex-Leicester man helped it onto Ziyech, who works to exploit the next weakne s in the City defence. This was located out wide, where the away full-backs could get caught out as they pushed far up the pitch to pre s, as Mendy has done here.Naturally, this left the defence quite narrow, so a cro s Antonio Callaway Jersey to the far post was the best option. James did just that to find Chilwell, who failed to get the right contact on his shot and mi sed well wide.Every time De Bruyne was bypa sed, Chelsea would have acres of space to work with in midfield and could pose a serious threat in transition, but as we saw in the above example, they always failed to capitalise. Their goal came from a different method.Chelseas attacking threatAlthough Chelsea managed just five shots to Citys 11, they were clearly the more threatening side in attack as is proven by their higher xG.Aside from threatening City in transition (as we saw previously), the Blues also constructed their attacks quite well.Citys 4-2-3-1 was fairly narrow in defence as you can see here, Genard Avery Jersey meaning that cro s-field pa ses could be used to hurt them. Chelseas favoured direction was right to left, as they attempted nine such balls from the midfield third.The reason they did so was that they had two very potent attackers on that side in Mason Mount and Chilwell.Mount had the ability to chop onto his right and shoot from the edge of the box, while also being able to run at a defender and beat him one-on-one or slip a through pa s. Chilwell, meanwhile, po se sed good pace and cro sing ability, meaning that he too could pose problems to the City defence.Both of them were quite succe sful too, as Mount got three dribbles and drew as many fouls, while Chilwell managed to deliver three cro ses.However, Chelsea were most potent when playing direct football, which is how they scored. Ziyechs 55th-minute strike had been coming for a long, long time.Chelsea almost scored a near-identical goal in the sixth minute. Chilwell played Timo Werner (who happened to be offside, which is why the goal did not stand) through on the right after both Cancelo and Rben Dias made tough work of dealing with a simple long ball, with the latters half-hearted clearance falling to the Chelsea wing-back.Once he was through on the left, Werner simply squared a first-time ball to Ziyech, who turned it in without any problems.The goal did not come as a result of an aerial ball, but it too was quite direct in nature. Silva took a free-kick at the edge of his penalty area quickly, and just two pa ses later, Chelsea found Eric Murray Jersey themselves in this position:Once again, Werner was making a run down the left channel goal-side of both Cancelo and Dias, and this time, the German striker ensured that he was onside.Zack Steffen positioning here was questionable at best, but even if he was in his goal, saving Ziyechs tap-in would have proven to be quite difficult.It was clear that Chelseas forwards po se sed too much pace for Citys backline to deal with, and this was most evident when Ziyech had the chance to bag a brace as he only had Steffen to beat after Chelsea breached the City high line through a long ball.ConclusionIf you would have just watched the first 10 minutes of the match, you would have been able to tell that this was Chelseas to lose.Guardiola fielded a much-changed side that arguably only had three players from Citys current best XI Dias (who looked uncharacteristically shaky), De Bruyne (who went off injured) and Rodri (who saw relatively little of the ball).The other eight players were afforded the chance to stake a claim to regular starting spot here, but they absolutely failed to