Everyone was a bit leggy as they only got back from Greece late on Friday. Bit of luck required to get that result but showed a bit of fight to not crumble too.
It looks like that shoulder/arm injury Kolasinac suffered that forced the Saka sub might be a bad one, but Tierney should be approaching match-fitness now (his ETA was late Feb) so hopefully he'll be able to give Saka soon.
As he's still young and playing with his mates he went through the academy with, I'd hope that's enough to keep him where he is for the time being, and obviously as with several other players it's rather imperative that there's either a EL final victory or nabbing a CL spot in the league.