It's interesting that it is up to me for a solution on this, rather than the best manager in the game. I'd have gone Rico left back and put Gvardiol at centre back personally. I didn't mind the new lad starting initially but after hearing he hadn't even played a game in a month didn't sit well with me. Rusty, young, new league in a fragile team, we threw him in at the deep end and should have protected him more. Just my opinion, I am confident in believing I am right based on his performance.
I don't want to keep getting into it but yes, if you give a goal away and you are on a yellow card within 3 minutes then I believe you haven't started well. He then gave it away in bad positions shortly afterwards a few times. The awful header has nothing to do with Akanji, it is terrible technique. It was a bad game to test him in as Chelsea could and should have been a few up before we then got a foot in the game. They ran through us with ease and for some reason held back that second half, a combination of us being better and them taking their foot off the gas. He went off early second half and we went onto win. He will get a proper chance and my support every match day, we can't delude ourselves that it wasn't that bad etc. Cost us a goal, booked after 3 mins and hooked after 50 odd minutes.