Matt Upson
Former Arsenal defender on BBC Radio 5 Live at BayArena

Leverkusen are playing out of the fullback area so well. They're patient and biding their time and waiting to draw their opposite Arsenal number out to pop it down the line, or play it inside.

They're selecting the right pass 85/90% of the time which is the difference in this game. Arsenal aren't hitting those numbers and the hosts are looking pretty comfortable.

Lovely football from the hosts who string a number of passes together as they work the ball from left to right and then fling in a cross that the Gunners clear.

Bayer Leverkusen almost get Christian Kofane in down the left but the Arsenal goalkeeper David Raya tidies up around 10 yards from the half-way line.

Image source, Getty Images

The hosts are pretty much camped with 11 men behind the ball now. But can Arsenal break them down and not get caught on the break?

Exequiel Palacios absolutely clatters Martín Zubimendi. That's what's called leaving one on someone from the Bayer Leverkusen midfielder.

It deservedly means he collects a yellow card.

Noni Madueke replaces Bukayo Saka for Arsenal.

Madueke scored in his only other Champions League appearance as a substiture this term in a 3-1 victory over Bayern Munich in November.

Matt Upson
Former Arsenal defender on BBC Radio 5 Live at BayArena

Image source, Getty Images

Saka's had no joy at all in those one v one situations and it's mainly due to Palacios' reading of the game.

He looks mentally like he's having a dip. He's just not at the races, he sees three players in front of him and he's trying to take them all on.

Declan Rice floats in the free-kick but it's well defended by the hosts.

Gabriel Martinelli darts down the left and is brought down by Ernest Poku, who picks up a yellow card. Decent position this.

Just signs Arsenal are starting to wake up in this second half.

Bodo/Glimt will equal the Champions League record for most consecutive games played with the same starting XI.

After four straight wins it’s little surprise Kjetil Knutsen has named the same side for the fifth game in succession – something only Auxerre previously did in 2002-03.

Bodo/Glimt XI: Haikin, Sjovold, Bjortuft, Gundersen, Bjorkan; Evjen, Berg, Fet; Blomberg, Hogh, Hauge

Subs: Lund, Sjong, Nielsen, Aleesami, Auklend, Saltnes, Helmersen, Klynge, Riissnaes, Bassi, Maatta, Mikkelsen

Left-back Maxi Araujo and wide-man Pedro Goncalves are out through suspension for Sporting, while another left-back, Ricardo Mangas, forward Fotis Ioannidis and star 18-year-old winger Geovany Quenda, who will join Chelsea in the summer, miss out through injury.

Sporting XI: Rui Silva, Vagiannidis, Diomande, Inacio, Fresneda, Simoes, Hjulmand; Catamo,Trincao, Guilherme, Suarez.

Subs: Virginia, Callai, Morita, Debast, Nuno Santos, Faye, Braganca, Moreira, Goncalves, Quaresma, Nel.

Image source, Getty Images

Arsenal look a little rattled at the present. They are struggling to get out and press the hosts, who are well on top.

The goal they conceded was only the the second time ever Arsenal have allowed an opponent to score in the first minute of the second half in a major European game, with Zlatan Ibrahimovic's goal for Barcelona in March 2010, the other occasion it happened.

Nizaar Kinsella
BBC Sport Chelsea reporter

Paris St-Germain give Balon d'Or-winning striker Ousmane Dembele his first start since his recent injury lay-off against Chelsea.

Midfielder Joao Neves, who was also a doubt before kick-off, starts for PSG.

PSG XI: Safonov; Hakimi, Pacho, Nuno Mendes, Marquinhos, Neves, Vitinha, Barcola, Zaire-Emery, Doue, Dembele

Subs: Chevalier, Marin, Beraldo, Zabarnyi, Kvaratskhelia, Goncalo Ramos, Lee, Hernandez, Mayulu, Dro Fernandez, Mbaye

Chelsea pick goalkeeper Filip Jorgensen over their previous number one option Robert Sanchez.

Marc Cucurella makes his first start since a recent hamstring lay-off as Liam Rosenior plays Reece James in midfield and Malo Gusto at full-back.

It's unsurprisingly a line up largely considered to be Chelsea's strongest XI.

Chelsea XI: Jorgensen; Gusto, Fofana, Chalobah, Cucurella; Caicedo, James; Palmer, Fernandez, Neto, Joao Pedro.

Subs: Merrick, Acheampong, Tosin, Badiashile, Hato, Santos, Lavia, Garnacho, Guiu, Delap

Theres no Kylian Mbappe in the Real Madrid squad because he has not recovered from a knee problem.

Real Madrid XI: Courtois, Alexander-Arnold, Rudiger, Huijsen, F. Mendy, Tchouameni, Valverde, Brahim, Thiago, Guler, Vinicius

Subs: Lunin, Gonzalez, Carvajal, Camavinga, Gonzalo, Asencio, Garcia, Mastantuono, Aguado, Cestero, Angel, Palacios

Erling Haaland returns to the starting XI for Manchester City as Marc Guéhi and Antoine Semenyo make their Champions League debuts for the club.

Haaland comes in along with captain Bernardo Silva, Gianluigi Donnarumma, Ruben Dias and Rodri.

Manchester City XI: Donnarumma, Khusanov, Dias, Guéhi, O’Reilly, Rodri, Bernardo, Savinho, Semenyo, Doku, Haaland

Subs: Trafford, Bettinelli, Reijnders, Stones, Ake, Marmoush, Cherki, Nico, Ait-Nouri, Nunes, Foden, Alleyne

Alex Howell
BBC Sport Arsenal reporter at BayArena

That's two really well-worked routines that have lead to that opener.

The first is from the kick-off which leads to the corner that Leverkusen score from.

Andrich, who may be lucky to have not got two yellow cards in the first half heads in.

It's a new experience for Arsenal in this season's Champions League as it's the first time they have been behind in the competition this season.

Matt Upson
Former Arsenal defender on BBC Radio 5 Live at BayArena

Image source, Getty Images

What a massive goal and what a poor start to the second half for Arsenal.

They've not been switched on since coming out after the break. They gave away the first chance after 15 seconds and this corner, they just get undone.

It's very unlike them, it's a free header for the most aerially dominant player for Leverkusen. They'll be really disappointed with that Arsenal, it was far too easy.