RDM need one thing to learn about our defeat especially against atletico and shaktar,,both them play same formation like us 4-2-3-1,,we know they are in good perform atletico (europa league Champion) and shaktar (unbeatean with great winning record and only draw 2),,for this kind of game with in perform team like this and using same formation like us we need different touch or tactic to take this game about formation... we use this fomation because we know how good it's, we get balance from this formation in attack and defence,so this formation bring us to face a team with good in counter attack and strong in defence,but we have to remember we use this formation after RDM take a charge (compare with atletico and shaktar who use this formation for along time with more solid player) so we still learn to find balance in this formation (the proof is our preseason game,it's look same scenario just like we lost against atletico and shaktar)our 3 ATM (Mazacar) can't do their job to exploit space in opponent defence because they defence with 9 man with each player stay close in middle of their defence this situation make our 2 DM go to high of the pitch to support them and strech opponent defence,,and it leave us so vulnerable in defence with only leave 4 man in Defence.. i think we have to play old chelsea tactic(play long ball crossing into heart their defence,,it will not effective but with patience,,try try and try we can make it but with one important condition we have Killer striker(strong in the air,have good one touch and strong shoot) the advantage of this our defence will more solid and they not always out of possesion,,or we can add on for this with 3 ATM who have good long range shoot,,i like our new system it really enjoy to watch and so far bring us to top of the league,,but when it doesn't working we need plan B to approach some opponent,,so i hope RDM and our player can learn from this this lose to fix our weekness,,this lose will not make us week but it will make us stronger as a team.