Bit of amateur psychology here but I think Saka should have started and been subbed, if he was going to be used at all. In previous games he clearly wasn’t phased by the occasion and just playing it like another game, when he came on it was clear he was aware of the scale of the occasion having watched it play out to that point, and it made him nervous. Made it even more stupid to put him in the five penalty takers.
That said he wasn’t actually that bad, and did a few good things. He just misplaced one pass and a couple of his runs weren’t timed properly cos he was too hesitant.
(just protecting my boy)