Matchday 3 sees some crucial match-ups but none may be more important at this stage than the Standard Liege – Olympiacos fixture. Arsenal look to be a lock for top spot in Group H but second place is wide open. A win today for Olympiacos would put them in the driver’s seat.

If they lose at home today against Arsenal, last season’s Eredivise champions AZ Alkmaar could be done. AZ are struggling this season, having already lost five of their ten Eredivisie matches and have only collected one point from the first two Matchdays. Coach Louis van Gaal, who guided them to the title last season, left in the summer to take over at Bayern Munich, and his successor Ronald Koeman, formerly of Barcelona, has not got the team playing at their best yet. Another loss would severely dent their hopes of even making the Europa League parachute spot.

Another club that has under-performed in recent outings is Liverpool. Life was not a beach for the Reds as a loss to Sunderland in the English Premier League on Saturday followed on the heels of a loss in the domestic league to Chelsea and a defeat in the Champions League to Fiorentina. The once-solid back four has many critics now and a loss to Lyon could have the fans and media calling for change.  Rafa Benitez  might be looking ahead to a crucial clash against Manchester United this coming weekend so it will be interesting to see what his team selection and formation will be. Benitez did indicate in his press conference on Monday that Fernando Torres would not be available so that will likely mean Dirk Kuyt starting up front on his own.

Full Tuesday schedule (my predictions in bold):
AZ v Arsenal
Barcelona v Rubin Kazan
Debreceni v Fiorentina
Inter Milan v Dynamo Kiev
Liverpool v Lyon (DRAW)
Olympiacos v Standard Liege
Rangers v Unirea Urziceni
VfB Stuttgart v Sevilla (DRAW)

Part of the changes to qualification this year sees the champions of smaller domestic leagues gaining the chance to reach the group stage of the Champions League.

In the Champions Path, the feature match-up should be between FC Zurich and FK Ventspils. Latvian titleholders Ventspils edged past last season’s group stage participant FC BATE Borisov on away goals despite losing 2-1 away in the second leg of their Third Qualifying Round tie. Ventspils have a balanced attack but their main goal threat is Andrejs Butriks, who had a trial with Blackpool in England during the January 2008 transfer window. Butriks has remained in Latvia and been a consistent threat.

Swiss champions FC Zurich have a couple of players to keep an eye on. Johan Vonlanthen, despite being only 23, has already gained extensive experience in his career in stints with PSV Eindhoven, Brescia and Red Bull Salzburg. Up front, the pair of Swiss youngster Almen Abdi and French import Eric Hassli combined for 36 goals in 36 Swiss league games.

The glamour matchup in the Non-Champions Path sees Arsenal take on Celtic but the game that may produce a shock result is the Panathinaikos – Atlético Madrid tie. Panathinaikos scored a massive 3-0 win to overcome a 3-1 deficit in the second leg of their Third Qualifying Round tie with AC Sparta Praha. With experienced players like Gilberto and Giorgos Karagounis complemented by the pace and skill of Sebastián Leto and Djibril Cissé, Atletico could have a tough scrap on their hands.

The full playoff round match-ups (games to be played on August 18 and 26) are as follows:

Non-champions Path
Arsenal FC (England) v Celtic FC (Scotland)
Olympique Lyonnais (France) v RSC Anderlecht (Belgium)
Sporting Clube de Portugal (Portugal) v ACF Fiorentina (Italy)
Panathinaikos FC (Greece) v Club Atlético de Madrid (Spain)
VfB Stuttgart (Germany) v FC Timisoara (Romania)

Champions Path
Olympiacos CFP (Greece) v FC Sheriff (Moldova)
FC København (Denmark) v APOEL FC (Cyprus)
PFC Levski Sofia (Bulgaria) v Debreceni VSC (Hungary)
Maccabi Haifa FC (Israel) v FC Salzburg (Austria)
FC Zürich (Switzerland) v FK Ventspils (Latvia)