Up for grabs this week, on the sixth and final matchday of this season's UEFA Champions League group stage, are the final three places in the knockout phase. Group A rivals Roma, Chelsea and Bordeaux are competing for the two tickets still on offer in their section, while over in Group B, Panathinaikos and Anorthosis Famagusta do battle for a berth in the last 16.
Inter Milan are already safely through from Group B, as are Barcelona and Sporting from Group C, Liverpool and Atletico Madrid from Group D, Villarreal and Manchester United from Group E, Lyon and Bayern Munich from Group F, Arsenal and Porto from Group G, and Juventus and Real Madrid from Group H. However, with one round still to play, so far only Barça are guaranteed to finish top of their pool - a privilege which ensures the second leg of their last-16 tie will be played on home soil.
The big match
Panathinaikos-Anorthosis Famagusta, OACA Spiro Louis stadium, Athens, 9 December, 20.45 CET
After picking up a solitary point from their opening three group games, Panathinaikos bounced back in style with a 3-0 away win over Werder Bremen, followed by a 1-0 victory at Inter Milan. A point ahead of Tuesday's Cypriot opponents in the Group B standings, a draw would be enough to send the Greek heavyweights through. Temuri Ketsbaia's Anorthosis, meanwhile, need to take all three points to progress, and may have to do so without their influential Brazilian winger Savio, who is an injury doubt.
The other matches
Despite opening their Group A campaign with a 2-1 home defeat by Cluj of Romania, Roma now find themselves top and need just a draw against Bordeaux to qualify for the next round. A win for Luciano Spalletti's side would ensure they clinch first place, though their French opponents can still overtake them by claiming all three points at the Stadio Olimpico. Chelsea, who are a point behind Roma and one clear of Bordeaux, round off their group campaign by welcoming Cluj to Stamford Bridge.
Flying high at the top of Serie A, though rather less imperious in Europe, already-qualified Inter Milan will be determined to win at Werder Bremen and bank first place in Group B. Werder, for their part, can still claim a place in this season's UEFA Cup.
The placings in Group C are already set in stone, with section winners Barcelona likely to rest players at home to Shakhtar Donetsk ahead of this weekend's derby with Real Madrid.
Over in Group D, joint-leaders Atletico Madrid and Liverpool visit Marseille and PSV Eindhoven respectively, looking to finish at the summit. Their French and Dutch opponents, meanwhile, who are level on three points apiece, are competing for the group's UEFA Cup berth.
Group E's bottom side Celtic will have nothing but pride to play for when they host already-qualified Villarreal, who are level on points with leaders Manchester United. The Red Devils will be determined to clinch first place when they welcome Danish outfit Aalborg to Old Trafford.
At stake at the Stade de Gerland in Lyon will be first place in Group F, where the home side and their injury-stricken backline host a Bayern Munich team rejuvenated since the return to fitness of Franck Ribery. Steaua Bucharest, for their part, can wrest a UEFA Cup place from Fiorentina with a home win over La Viola.
In Group G, Porto will be out for revenge against an Arsenal side still unbeaten in this year's competition. The Portuguese champions lost 4-0 in north London on Matchday 2, but can top the standings by taking all three points at the Estadio do Dragao. Third-placed Dinamo Kiev, meanwhile, will ensure their involvement in this year's UEFA Cup by avoiding defeat at home to Fenerbahce.
Finally in Group H, leaders Juventus need just a point against tailenders Bate Borisov in Turin to claim top spot, while second-placed Real Madrid face Zenit at the Santiago Bernabeu. Zenit, in third, who are the UEFA Cup holders, will have the chance to defend their throne.
Player to watch
Lisandro Lopez, Porto's Argentinian striker, has hit 52 goals in 108 games for Os Dragões and was the Portuguese league's leading scorer last season. Having plundered three goals in five Champions League matches so far, can Lopez spearhead a home victory over the Gunners that would guarantee first place in Group G?
14 - The length of Chelsea's run of Champions League matches without defeat at Stamford Bridge: 11 wins and three draws. The last team to emerge victorious at the Blues' London fortress in the elite competition were Barcelona, who on 22 February 2006 came away with a 2-1 first-leg win in the last 16.
What they said
"When we are under pressure the team seem to show their true colours. We just need to focus on giving our best performance and then we will get the result we need to qualify," Nikos Spiropoulos, Panathinaikos player.
Have your say
Can Anorthosis spring another surprise by beating Panathinaikos away? Which two teams will progress from Group A? Will Lyon edge out Bayern to finish top of their group? Click on 'Add your comment' to share your views on Matchday 6.