Champions League group stage squads confirmed
Chelsea made it three English teams through to the last-16 of the Champions League with a 4-0 win at Qarabag this week, but their Premier League rivals Manchester United and Liverpool still have work to do - they must avoid defeat in their final group matches to progress.
Should they do so, England will have a record five teams in the knockout stage - with Manchester City and Tottenham Hotspur already through.
Elsewhere, Paris Saint-Germain (PSG) have set a goalscoring record for the group stage with a match to spare, while Barcelona, Bayern Munich, Besiktas and Real Madrid have also qualified.
Teams that finish third in their group will drop into the Europa League, while those who finish bottom are out of European competition entirely.
Here, we take a look at who is through and who still has work to do, with one round of matches remaining.
Those matches will take place on December 5 and 6.
GROUP A: MANCHESTER UNITED, BASEL, CSKA MOSCOW, BENFICA
United: A point in their final match against CSKA Moscow at Old Trafford will guarantee their progress to the knockout stage as group winners. The only way they will not go through is if they lose by more than six goals.
Basel: Can still qualify - or go out. Such is the situation in the group, they could lose their final game to Benfica and still go through - and could win and go out. If they win, a four- or five-goal win for CSKA would see them eliminated.
CSKA: Can still qualify - and can still go out. If they lose, they are out. A draw will be enough for them to go through if Basel lose, but a victory may not be enough if Basel also win.
Benfica: Already eliminated having lost their first five group matches.
GROUP B: PSG, BAYERN MUNICH, CELTIC, RSC ANDERLECHT
PSG: Guaranteed to top the group if they avoid defeat by Bayern on December 5.
Bayern: Have qualified for the last 16, along with PSG. They will need to beat PSG by more than three goals to top the group.
Celtic: Will qualify for the Europa League if they avoid defeat by Anderlecht in their final match.
Anderlecht: To finish third they need to beat Celtic by a greater margin than the 3-0 defeat they suffered at the hands of the Scottish champions earlier in the group phase.
GROUP C: CHELSEA, AS ROMA, ATLETICO MADRID, QARABAG
Chelsea: Have qualified for the last 16 and will definitely top the group if they beat Atletico in their final game.
Roma: Will guarantee a top-two finish with a win over Qarabag. If Roma win and Chelsea fail to do so, the Italians will top the group.
Atletico: They must beat Chelsea to have any chance of finishing in the top two - then hope Roma fail to win. If Roma draw, Atletico will go through by virtue of their superior head-to-head record.
Qarabag: Will finish bottom having failed to win any of their group matches to date.
GROUP D: BARCELONA, JUVENTUS, SPORTING LISBON, OLYMPIAKOS
Barcelona: Have qualified for the last 16 and will top the group no matter what happens in their final match against Sporting.
Juventus: Victory over Olympiakos will guarantee their place in the last 16.
Sporting: Can still qualify - if they beat Barcelona and Juventus fail to win.
Olympiakos: Cannot even qualify for the Europa League after taking a single point from their opening five matches.
GROUP E: LIVERPOOL, SEVILLA, MARIBOR, SPARTAK MOSCOW
Liverpool: Will go through as group winners if they beat Spartak at Anfield in final match. Will also qualify for the last 16 with a draw.
Sevilla: Will definitely qualify with victory over Maribor and will go through with a draw if Spartak do not beat Liverpool. If Liverpool lose and Sevilla win, the Spanish side will top the group.
Spartak: Victory at Anfield would take them through, but anything less will mean they drop into the Europa League.
Maribor: Will finish bottom having collected two points from their first five matches.
GROUP F: MANCHESTER CITY, SHAKHTAR DONETSK, NAPOLI, FEYENOORD
City: They are through as group winners having won their first five matches.
Shakhtar: Will go through as runners-up if they avoid defeat by City in their last match.
Napoli: Need to beat Feyenoord and hope City beat Shakhtar.
Feyenoord: Will finish bottom having lost all five of their matches to date.
GROUP G: BESIKTAS, PORTO, LEIPZIG, MONACO
Besiktas: Through as group winners.
FC Porto: Will be guaranteed second place if they beat Monaco in their final match.
RB Leipzig: Will finish second if they beat Besiktas and Porto fail to beat AS Monaco.
Monaco: Last season's semifinalists are out of Europe having failed to win any of their first five matches.
GROUP H: TOTTENHAM HOTSPUR, REAL MADRID, BORUSSIA DORTMUND, APOEL NICOSIA
Tottenham: Through as group winners in an impressive campaign including a win and a draw against defending champions Madrid.
Real Madrid: Qualify as runners-up.
Dortmund: A point against Madrid will guarantee them a Europa League place.
Apoel: Will finish third if they avoid defeat by Spurs and Dortmund lose at Real.