Manchester United needs one point, while Paris Saint-Germain and Bayern Munich have already earned their spots in the last 16.

AFP Sport looks at who can qualify from the teams playing on Wednesday (all times 1945 GMT unless stated).

Group A

CSKA Moscow v Benfica (1700 GMT)

Basel v Manchester United

Manchester United require just a point away to Basel to qualify and secure top spot as Jose Mourinho's team close in on a first appearance in the knockout phase since 2013-14. Paul Pogba's return from injury at the weekend inspired United to a 4-1 rout of Newcastle, just their second win in five league outings, while Zlatan Ibrahimovic also made his comeback following a serious knee injury. Basel could also qualify with victory over United if CSKA Moscow lose at home to Benfica, who must win to retain any outside chance of advancing.

Read: Lampard excited by English clubs in Champions League

Group B

Paris Saint-Germain v Celtic

Anderlecht v Bayern Munich

Paris Saint-Germain and Bayern Munich are already guaranteed of its spots in the last 16, with Celtic and Anderlecht scrapping to continue its continental adventure in the Europa League. Unai Emery's PSG have scored 17 goals without conceding to record four straight group-stage wins, while Edinson Cavani scored twice more as they pulled six points clear in France following a 4-1 defeat of Nantes. Bayern have been rejuventated by the appointment of 72-year-old Jupp Heynckes, winning all eight matches since he replaced Carlo Ancelotti.

Group C

Qarabag v Chelsea (1700 GMT)

Atletico Madrid v Roma

Roma can seal their place in the next round with a point at Atletico Madrid, while Chelsea will progress with victory over Qarabag — or if Atletico fail to win in Spain. Diego Simeone's side — finalists twice in the past four seasons — have drawn four of its matches so far and appear heading to a premature exit. Buoyed by its 2-1 derby win over local rivals Lazio, Roma can wrap up first place with victory if Chelsea is denied all three points in Azerbaijan.

Also read: Guardiola dismisses Champions League favourite tag

Group D

Juventus v Barcelona

Sporting Lisbon v Olympiakos

Lionel Messi and Barcelona will qualify and clinch top spot with a draw against last year's finalists Juventus. Massimiliano Allegri's Juve slumped to a rare defeat on Sunday, as Gianluigi Buffon and Andrea Barzagli were rested for a 3-2 loss at Sampdoria. But the six-time reigning Italian champions can move through to the knockout round if they avoid defeat and Olympiakos get a result at Sporting. Both sides in Lisbon realistically must win to harbour any hope of staying in contention.