Possible line-ups and team news for Wednesday

Group A
Arsenal v Ludogorets
Arsenal: Ospina; Bellerín, Mustafi, Koscielny, Monreal; Xhaka, Cazorla; Walcott, Özil, Iwobi; Sánchez.
Out: Giroud (back), Ramsey (hamstring), Mertesacker (knee), Welbeck (knee), Akpom (back)

Ludogorets: Stoyanov; Minev, Moți, Palomino, Natanael; Dyakov, Anicet; Misidjan, Marcelinho, Wanderson, Cafú.

Paris v Basel
Paris: Aréola; Aurier, Marquinhos, Thiago Silva, Maxwell; Verratti, Krychowiak, Matuidi; Lucas, Cavani, Di María.
Out: Pastore (calf), Thiago Motta (buttock)

Basel: Vaclík; Lang, Suchý, Høegh, Traoré; Xhaka, Zuffi; Bjarnason, Delgado, Steffen; Doumbia.
Out: Akanji (fitness)
Doubtful: Traoré (unknown), Šporar (ill)

Napoli players enjoying themselves in training on Tuesday©AFP/Getty Images

Group B
Napoli v Beşiktaş
Napoli: Reina; Hysaj, Maksimović, Koulibaly, Ghoulam; Zieliński, Jorginho, Hamšík; Callejón, Gabbiadini; Mertens.
Out: Granata (suspended), Milik (knee)
Doubtful: Albiol (thigh)

Beşiktaş: Fabri; Gönül, Marcelo, Tošić, Caner Erkin; Hutchinson, Inler; Quaresma, Talisca, Adriano; Cenk Tosun.
Out: Oğuzhan Özyakup (ankle)

Dynamo Kyiv v Benfica
Dynamo: Rudko; Morozyuk, Khacheridi, Vida, Antunes; Rybalka; Yarmolenko, Sydorchuk, Fedorchuk, González; Júnior Moraes.
Out: Garmash (knee)
Doubtful: Tsygankov (hamstring)

Benfica: Ederson; Semedo, Jardel, Lindelöf, Grimaldo; Fesja, Pizzi, Salvio, Cervi; Guedes, Mitroglou.
Out: André Almeida (leg), Andre Horta (thigh), Rafa (thigh), Jonas (foot)

Josep Guardiola offers some advice to Kelechi Iheanacho©AFP/Getty Images

Group C
Barcelona v Manchester City
Barcelona: Ter Stegen; Sergi Roberto, Piqué, Mascherano, Alba; Rakitić, Busquets, Iniesta; Messi, Suárez, Neymar.
Out: Cillessen (ankle)

Man. City: Bravo; Zabaleta, Stones, Otamendi, Clichy; Fernandinho, Gündoğan; Sterling, Silva, De Bruyne; Agüero.
Out: Sagna (hamstring), Delph (muscle)

Celtic v Mönchengladbach
Celtic: Gordon: Lustig, Sviatchenko, Touré, Tierney; Forrest, Brown, Bitton, Sinclair; Rogic, Dembélé.
Doubtful: Lustig (knee)

Mönchengladbach: Sommer; Elvedi, Vestergaard, Jantschke, Wendt; Kramer, Dahoud; Traoré, Hofmann; Stindl, Hahn.
Out: Domínguez (back), Doucouré (fitness), Drmić (knee), Christensen (muscular), Raffael (thigh), Hazard (knee), Johnson (illness), Schulz (hand)

Philipp Lahm in good form during Bayern training©Getty Images

Group D
Bayern München v PSV
Bayern: Neuer; Lahm, Boateng, Hummels, Alaba; Thiago, Kimmich, Vidal; Robben, Lewandowski, Müller.
Out: Ribéry (muscle problem)

PSV:Zoet; Brenet, Schwaab, Isimat-Mirin, Moreno, Willems; Guardado, Pröpper, S De Jong; Narsingh, L De Jong.
Out: Hendrix (knee), Locadia (groin)

Rostov v Atlético Madrid
Rostov: Dzhanaev; Bayramyan, Mevlja, Navas, Granat, Kudryashov; Gatskan, Noboa, Erokhin; Azmoun, Poloz.
Out: Bukharov (muscular)
Doubtful: Terentyev (muscle), Kalachev (heel)

Atlético: Oblak; Juanfran, Savić, Godín, Filipe Luís; Correa, Gabi, Koke, Carrasco; Torres, Griezmann.
Out: Augusto Fernández (cruciate), Giménez (groin), Moyà (knee), Cerci (knee)
Doubtful: Saúl (ankle)