Liverpool fan here who watches Barca almost as much as LFC. Purely on a football side of things rather than endless childish 'we gonna batter you', 'you ain't won shit for 30 years'
This is the dream tie for me as I have drooled over Barca's football at their best for years now. Obviously Barca not at their best comparatively but their second or third best is better than 99% of teams in the world.
There will be no surprises in this match in terms of tactics - Barca will seek endless possession and try to prise open a very good LFC backline, while LFC will seek to counter with pace. I think both teams will therefore score unless something like a red card disrupts the script. I think Barca are rightly favourites and expect them to score 2-3 goals as although LFC's defence is brilliant in the EPL they rarely face attacks of this quality and frankly I doubt them when under constant pressure. Also Barca have to go all out in this home leg - it's their raison d'etre, and have the ability to blow teams apart when fully ramped up and motivated. I see a one or two goal lead for Barca with a likely away goal for LFC setting up a tense return leg.
Overall I'm excited to see Messi play - he is simply the very best player ever to walk this earth and no one but none including Pele or Maradonna were even in the same league as him. Enjoy him while he lasts
So prediction is Barca win, Messi to score and LFC away goal