The in-game switches as the Blues notched up impressive back-to-back wins were studied by Chelsea legend Pat Nevin, who is also looking forward to a big night in the San Siro…

Every manager has problems and some even have problems of their own making. That, maybe surprisingly, is the case with Graham Potter just now. That’s not to say it is always a bad thing to have a few problems. This dilemma is of course about who to play, having given so many players opportunities since he took over and getting such generally good performances from them all. There are quite a few who will have to miss out on starting in vital games even if they have done nothing wrong, or have indeed done an awful lot right.

Tonight is a huge one yet again for the Blues and you would reckon the head coach would go for his first-choice 11 when we start in the intimidating arena that is the San Siro on a Champions League night. But what is his A team? For starters, in his first four matches, we have used 21 different players while winning three and drawing the other. On top of that there have been nine goals and eight different scorers. This has been a feature of Chelsea for a long time to be fair, but it goes to show that just about anyone can notch for us when he is given a chance.

So once again I wouldn’t even hazard a guess about tonight’s team sheet before it arrives on this website, but there must be at least some temptation to keep Conor Gallagher and Mason Mount together. I thought both showed incredible energy levels against Wolves and Mason probably had his best game of the season for me. The two assists for Kai Havertz and Christian Pulisic were little more than the icing on a very impressive cake.

Frightening Broja thought

The scorers against Wolves were particularly pleasing. Christian needed that goal and Kai would have been desperate to score as he was the chosen centre-forward on the day. The goal by Armando Broja may have looked like a nice little extra bonus at the end, but I suspect it will be one of very many for our 21-year-old striker in the years to come. He is improving alarmingly quickly and the thought of what he could be in a couple of years is frightening, seeing as he is good enough for this level already at his tender age.

What is clear is that there is a real importance being placed on having not only fully fit players on the field, but totally fresh players too. Thiago Silva had a good old rest but then so did Raheem Sterling and Pierre-Emerick Obameyang, though to be fair, the latter two must have been itching to get on against Wolves as we were creating chances at will and both would have felt they could have filled their boots and added to their goal tallies for the season.

Boosting your numbers might be very important for strikers, but right now they are of secondary importance compared with the run of games squeezed so tightly together. It is about getting the wins while not trashing anyone’s fitness levels if you can possibly help it with too much game time.

Willing to be adaptable

One of the other notable features of the game at the weekend was the ‘in game' tactical changes. Any manager can do this, but it is doing it the right way at the right time and getting the desired result that is the real trick. It was very noticeable when we changed from what looked like a flat back four with Cucurella, Koulibaly, Chalobah and Azpi, to a three of Cucurella, Koulibaly and Chalobah, we suddenly had much more joy going forward as Pulisic and Azpi, now on wing-back duties, shredded the opposition at will.

I remember years ago watching Jose Mourinho in his heyday spotting the necessary tactical changes quicker than anyone else and often having a devastating effect on a game before the opposition knew what he had done. I reckon Graham Potter is showing an exceptional talent in this area already at Chelsea.

Maybe this willingness to be adaptable is the most obvious thing about the new regime. There are some players who just want to play in their favourite roles but at Chelsea they are an adaptable bunch by and large, so I reckon they will be loving the different challenges being set for them every week and sometimes every 15 minutes.

Another huge upside to these changes is that it is very difficult for the opposition to prepare for Chelsea. How could they when they have no idea of the personnel or the system that we are likely to start with.

Some clubs say they don’t like to adapt to the opponent, so it shouldn’t make that much of a difference. Nonsense of course, why on earth would you have teams of people checking out your opponent, pouring over recent matches and sending in reports to the manager, if they didn’t want to use that information. Good luck writing a clear report on what Chelsea are going to do if you are one of Milan’s tactical technicians for tonight.

Perfect opportunity

Having said all that, this is still going to be one of the toughest games of the season so far and certainly the toughest one for the new coach in his new job. He will however relish it, more than anything else because he has learned so much about the relative abilities of both teams from the 3-0 victory last week. Milan looked very good at the start but clearly weren’t able to keep the pace up nearly as long as we could. There was a maturity to the way we let them run themselves out before completely dominating as the game wore on.

The other obvious advantage is of course the quality and the energy that we will have waiting on the bench to lift the team as soon as there is the slightest dip. After the poor showing in Zagreb, this is the perfect opportunity to show that Chelsea are a force to be reckoned with in this competition. There is danger from Olivier Giroud and Rafael Leao, but then they will look at our line-up and think there are goal threats absolutely everywhere. A win tonight and this group, that looked as if it was going to get away from us, will be if not in our control, then certainly well in our own hands.