Champions League | Lewandowski’s Barcelona faces Bayern, downbeat Liverpool takes on Ajax

Off to a great start with Barcelona, Robert Lewandowski is back in Germany to face former team Bayern Munich, with both teams coming off opening wins

A look at what's happening in the Champions League on Tuesday:

Only one of the two matches will take place after Rangers' home match with Napoli was rescheduled to Wednesday because of the limited police resources available in Scotland following the death of Queen Elizabeth II.

So, the focus is completely on Liverpool's home game against Ajax, with the teams having made contrasting starts to the group. While Ajax beat Rangers 4-0, Liverpool was thrashed by Napoli 4-1 in what was one of the English team's worst displays under Jurgen Klopp.

Liverpool hasn't played since — its Premier League game against Wolverhampton scheduled last Saturday was postponed following the queen's death — and Klopp was asked on Monday if the six-day break between games could see his team lose “rhythm.” “Did you see our game?” Klopp replied.

"If we could lose this kind of rhythm, it would be really cool.” Liverpool will be without left back Andrew Robertson, who has an unspecified injury that will rule him out until after the international break.

Atlético Madrid will face Bayer Leverkusen in Germany without several injured players, including midfielder Thomas Lemar and defenders José María Giménez, Stefan Savic and new signing Sergio Reguilón.

Atlético is coming off two straight wins after beginning the season with only two wins from its first four matches in all competitions. Leverkusen urgently needs to start winning games to ease the pressure on coach Gerardo Seoane after a terrible start to the season.