Look pretty toothless up front. Lots of huffing and puffing, no way to break down Arsenal. This could easily end 0-0, or horror of horrors, Liverpool get caught on the break.
Before the red cardit was a more open game, and there were some worrying signs. Milner was clearly being targetted and was having a tough time of it. In particular he was losing a lot of aerial battles, and balls were being played in behind him a lot, forcing him to turn and chase back a lot.
Arsenal were pressing high and causing a lot of discomfort to the midfield (thankfully the awful mistake by Henderson wasn't punished).
Then Xhaka gets sent off. I have to say, it didn't appear malicious, just stupid, a more lenient ref might have just yellowed him, but a red was probably right (depending on how clear you viewed the scoring chance to be).
Game has now turned into an attackers against defenders exercise. It would be criminal not to score here, before going to London for the return leg.