Roberto Firmino continued his fine scoring record in the competition with the opener in the 20th minute before Salah took over, netting his first just before half-time and then scoring a penalty shortly after the break to make it 50 goals in just 65 Reds appearances.
"We need to be on our toes and it will be hard for Belgrade, and that is good".
"It was not the best football we have played, but we got three points".
The Serbian league champions had a couple early scoring chances but Liverpool quickly settled into their attacking rhythm peppered with some pinpoint long passes to Salah. He was very aggressive, and quite impressive. For his first game for a while, his second [start] from the beginning, it was good, really good. It always helps a player if you play a good game - it helped us tonight and helped him. "That was the start, now he has to carry on". Much has been made of the fact Liverpool's main attacking trio have yet to hit the heights that saw them terrorise defences both home and overseas last season.
A second penalty was missed by Sadio Mane but the forward made amends moments later to net Liverpool's fourth.
"If we think about the same period of time - up until the middle of October - his record is very similar to past year". When you see how big the impact was of the boys coming on, that's really important as well. Mohamed Salah's goal kept the team on pace with Manchester City atop the Premier League standings.
The back five were untroubled against Red Star - a consistent theme so far this season - while players are beginning to find their best form.
"You can not do more than win your own games and then the situation changes in your favour". But much more is still expected.
Liverpool's recent success in Europe, which includes a Europa League and Champions League final, is in no small part thanks to Firmino's excellent form which has seen him feature in every single European match the club has played during Jurgen Klopp's tenure.
After all, he's had enough time to prepare for it.