And Barnes says Liverpool shouldn't be anxious about losing Salah next summer to Real Madrid, City or United, claiming the forward is only thriving thanks to Klopp's system.
He said: "It was a massive wake-up call for us to show more respect to the competition and to realise that in come circumstances you can beat Manchester United, different teams and opponents. As a United fan, that's a worry because it is still that mentality of "anyone but them".
Tottenham play Liverpool in the Premier League 2018/19. Maybe we miss that. Yes, we learned, the experience was that one game can be completely different to another.
He said: "We've had a great start to the season and I'm sure the team will be fighting for it [the title], but it's too soon to start thinking about it".
Gary Neville has responded to Jurgen Klopp's criticism of him following Neville's discussion over whether or not the Reds could win the league as the ongoing rivalry between Sky pundit and Premier League manager rages on.
The majority of Klopp's players were on duty with their national teams this month, and now head into a heavily congested period of seven games in 23 days.
I'll finish where I started - Guardiola wants return to Barca B
The recent worldwide break has again seen City winger Leroy Sane in the headlines over his slow start to the new season. I do my best and I think Phil is ready. "His work ethic is incredible and he will have a lot of minutes this season".
"Then today another one, and we need to be ready".
Garcia played for Liverpool between 2004 and 2007 and was part of the side which famously lifted the Champions League in 2005.
"We used the players who had the longest preseason, apart from Bobby [Roberto Firmino] who came pretty late". I don't understand, we play our kids or what? It is a big misunderstanding that we will plan for the game tomorrow and [also] think about the game after and the game after.
Dele Alli and Hugo Lloris are both out for Spurs, but Son makes a return for them from the Asian games (where South Korea won Gold).
Chelsea and their ever-changing manager are in fifth with an indifferent record but it is pain as usual for Arsenal who lie rock bottom of this table, having won just four of their 29 games against the top six.
Adam Lallana (groin) won't feature for Liverpool but Simon Mignolet is fit after a hand injury.