Yes they also had an international break and it's not whether they played for their teams, the most important thing is they weren't with their club coaches, that's my thinking of course. And yes they missed Mane, and replaced him with Coutinho, we missed our best player Pogba, his replacement Fellaini, Bailly, Zlatan and even Carrick and Blind. I say we were in a much worse state than them.
I think there is a serious underrating of Liverpool on here. They are a very capable side, especially in big games. They showed in against Arsenal (even if they are in bad state), they played toe to toe against City up till the red card. Going against Liverpool in the way they wanted us at their home ground i think we would have lost.
However I don't agree that they had couple of sitter, or they battered us. The Matip one was a sitter, which De Gea saved, and that chance i think Salah hit over the bar. Two very good chances, that's it. Everything else was dire play from them, and we gifting them some chances (Jones intercepted pass comes into mind). They were nothing special, and wasted a chance of getting three points. I watched the game with Liverpool fans, and they kept banging on about how awful they are them self. We had one very good chance also, in a very weak performance. I remember last years game and really can't remember but wouldn't say we were comfortable defending at Anfield. Generally it's a shit fixture for us, and thankfully it's out of the calendar.