Robertson was goosed, that's why Tsimikas came on. I'd have probably made that sub earlier because it was clear Robertson was having a poor game. It's unfortunate that Firmino was injured in the first half because that's taken away one of your second half subs.
I don't understand why we don't change the front three up when things aren't going our way. We could have moved Jota left, Mane right and Salah through the middle. Mane was having no joy down the left and the right hand side saw Trent, Elliott and Salah all wanting to come inside against a team that was just defending their 18 yard box.
In hindsight, Chamberlain on for Henderson might have been the better sub. Thiago didn't do a lot wrong but Chamberlain is more direct.