The Egyptian missed the 1-1 draw at Manchester United over the weekend, which ended the Anfield side's 17-match winning streak in the league.
Jürgen Klopp and his men have travelled to Belgium as Liverpool take on Genk in the Champions League group stage tie on Wednesday.
"When a team like Liverpool take 25 points from 27 and they play like they play I think they are one of the best teams in Europe, probably the best", said Mazzu. Genk held Napoli to a draw last time out and is confident in doing the same against Jurgen Klopp and company. While it's clear to see that they'll be a hard matchup for Liverpool, they're still the underdogs.
Mane was ineffective against United but Genk are coming into the fixture on the back of a loss to Standard Liege.
Champions League victory restores confidence, says Tottenham's Mauricio Pochettino
Managers and coaching staff always need to think that you need to win, today and tomorrow. We are also delighted with the clean sheet.
Earlier this week Guardiola called on his side to be more clinical in front of goal if they are to go deep into the competition this season, but it is their displays at the back that should be a more pressing concern.
Many of those fans will be eager to see how he gets on against Liverpool as Genk look to end a awful run of 14 games without a win in the competition proper. Sadio Mane, Roberto Firmino and Mohamed Salah are up top. They've proven that they'll make it hard for top teams to come into their stadium and walk out with three points. Riyad Mahrez put me through and I was looking to put one on a plate for him.
Foden, making a rare start in midfield, saw red for two bookings in quick succession in the 82nd minute.
Make sure you click on the link below to live stream the game for free and see for yourself how the rotation policy works out for the German.
Speaking at their pre-match press conference ahead of the Genk tie, broadcast on the club's official site, James Milner and Jürgen Klopp confirmed that Liverpool must improve their continental away form.