What i saw was players afraid of playing the ball on the ground. We had no players who could actually retain possession. We had 5 mins in the start where we played with some intensity, as a home team would normally do, but the game settled quickly and Sevilla took control in midfield. We had one chance in the first half with Fellaini, but that was really it. The Lukaku chances wasn't even chances, one was a punt from out the box and one he didn't even get a touch on. You could see our main plan was to get it to Fellaini. I don't think de Gea passed it to our defenders once, he always kicked it up to Fellaini. The game was lost with the players chosen and the tactics we had deployed for the day. Introducing Pogba to midfield with Matic and Lingard was just a car crash waiting to happen, we have seen that several times this season.
The players was certainly not without blame, but the manager has to take most of it.