If you could watch just one game tonight, which one would it be and why?

Would you watch Manchester City purely to see Erling Haaland in action or Paris St-Germain to see Kylian Mbappe? Or are you more interested in a clash between two big clubs Chelsea and AC Milan?

Oh Celtic.

Their fans are still celebrating a Dominik Szoboszlai goal being disallowed by the VAR for an Andre Silva offside... when Silva slots in to make it 2-1 to Leipzig.

Follow that one here.

Salzburg and Dinamo Zagreb are goalless.

Image source, Gracenote

Simon Gleave, head of sports analysis, Nielsen Gracenote: "After two wins, Manchester City's chance of reaching the Champions League last-16 is 99.85%.

"Having already won away against their main rivals for top spot, Sevilla, City's chance of winning Group G has increased from a pre-tournament 78% to 96% according to Gracenote's Euro Club Index, external."

Kylian Mbappe is back in the starting line-up for PSG tonight, as one of four changes from the weekend.

Mbappe came off the bench to score the winner in the 2-1 victory over Nice in Ligue 1, and tonight replaces Hugo Ekitike in the starting XI.

Danilo Pereira, Nuno Mendes and Marco Verratti also start in Lisbon, replacing Nordi Mukiele, Juan Bernat and Fabian Ruiz.

Benfica XI: Vlachodimos; Bah, Otamendi, A. Silva, Grimaldo; Fernandez, Luis; Neres, R. Silva, Mario; G. Ramos

PSG XI: Donnarumma; Pereira, Marquinhos, S. Ramos; Mendes, Verratti, Vitinha, Hakimi; Messi; Mbappe, Neymar

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Graham Potter is once again using Raheem Sterling and Pierre-Emerick Aubameyang as his strike force against AC Milan, the latter opening his account for the club in the 2-1 win at Crystal Palace at the weekend.

Ruben Loftus-Cheek comes into midfield with Jorginho and Kai Havertz dropping to the bench. Kalidou Koulibaly is back in central defence as Chelsea go in search of the win they need.

Chelsea XI: Kepa, Fofana, Silva, Koulibaly, James, Kovacic, Loftus-Cheek, Chilwell, Mount, Aubameyang, Sterling.

Subs: Bettinelli, Mendy, Azpilicueta, Chalobah, Cucurella, Gallagher, Jorginho, Zakaria, Pulisic, Ziyech, Havertz, Broja.

Chris Bevan
BBC Sport at Etihad Stadium

Image source, BBC Sport

No, this isn't a new Wembley-style arch at Etihad Stadium... it's just end result of some especially crazy Manchester weather today, with a mix of sunshine and torrential downpours in the run up to kick-off. Guess which one I was caught in on my way to the ground?

Anyway, I'm not sure if the legend of finding a pot of gold at the end of a rainbow is true, but there will almost certainly be a pot of goals here tonight if Erling Haaland is playing. More rain showers are forecast too...

Manchester City

Image source, Getty Images

Sergio Gomez says playing under Pep Guardiola at Manchester City is a dream.

The midfielder grew up in Catalonia, but supported City from a young age.

"I’m not from here - but I love the club, I am a City fan and it means a lot to me.

"It's a dream. When I arrived at Barcelona academy it was the first years of Pep as a manager.

"I learn from him when we chat or train. I take all the information he gives me. Hopefully I can learn more in the years to come."

Simon Gleave
Head of sports analysis, Nielsen Gracenote

Image source, Gracenote

Chelsea's poor start has made them the least likely of the four English clubs to qualifying for the knockout phase according to the latest simulations from Gracenote's Euro Club Index, external.

The Blues are still favoured to progress but their chance has declined from 86% to 57%. After no win in their first two matches, tonight is a must-win against current group favourites AC Milan.

Simon Stone
BBC Sport

Given the amount of goals he has scored in the early weeks of his Manchester City career, it is no surprise Erling Haaland is the centre of attention, nor that he is being linked with Real Madrid.

City have to deal with that - and also navigate round the speculation around a release clause in the contract he signed in the summer.

However, there are additional suggestions Haaland's contract contains a clause that is exclusive to Real and gives the Spanish giants a massive advantage if they wanted to buy him.

BBC Sport has been told those rumours are not true and there is no aspect of the deal that ensures Real get preferential treatment.

For their part, City are just enjoying the fact Haaland has turned them into overwhelming favourites win the Champions League for the first time in their history this season.

Perfect start to the second half for Celtic as Jota makes it 1-1 at Leipzig after a quick move from the Scottish champions.

Follow that one here.

Salzburg and Dinamo Zagreb are goalless.

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Chelsea simply cannot afford any slip ups tonight after a poor start to their Champions League campaign with defeat away to Dinamo Zagreb the catalyst for manager Thomas Tuchel's sacking followed up by a home draw against FC Red Bull Salzburg.

Milan have four points from two games and certainly look in relaxed mood before kick-off, with playing legend now technical director smilng out on the pitch at Stamford Bridge and still looking like could cruise through a game such as this.

Chris Bevan
BBC Sport at Etihad Stadium

Image source, BBC Sport

Manchester City make five changes from the side that crushed neighbours United in the Manchester derby here on Sunday.

With Kyle Walker sidelined by the injury he picked up in Sunday’s derby, Joao Cancelo switches to right-back and Ruben Dias, Aymeric Laporte and Sergio Gomez come into the back four.

Riyad Mahrez and Julian Alvarez are the other players who return to the starting XI, replacing Kevin de Bruyne and Phil Foden, who both drop to the bench, while goal-machine Erling Haaland continues up front.

Manchester City XI: Ederson, Cancelo, Dias, Laporte, Gomez, Mahrez, Gundogan, Bernardo, Grealish, Alvarez, Haaland.

Subs: Ortega Moreno, Carson, Rodrigo, De Bruyne, Akanji, Foden, Palmer, Lewis, Wilson-Ebrand.

There are two changes to the Real Madrid side that were held to a 1-1 draw by Osasuna at the weekend.

Eder Militao returns to partner David Alaba in defence with Antonio Rudiger dropping to the bench, while Federico Valverde is preferred to Dani Ceballos in midfield.

Real Madrid XI: Lunin, Carvajal, Militao, Alaba, Mendy, Valverde, Kroos, Tchouameni, Rodrygo, Vinicius, Benzema.

Image source, BBC Sport

There is just one change to the Shakhtar Donetsk side that thrashed Metalist Kharkiv 6-1 on Saturday, with Danylo Sikan - who scored a hat-trick in that game - making way for Maryan Shved.

Shakhtar Donetsk XI: Trubin, Konoplia, Bondar, Matviyenko, Mykhaylichenko, Stepanenko, Zubkov, Bondarenko, Sudakov, Mudryk, Shved.

Image source, BBC Sport

England midfielder Jude Bellingham once again captains Borussia Dortmund as they travel to Sevilla.

Sevilla XI: Bounou, Carmona, Gudelj, Salas, Telles, Navas, Jordan, Rakitic, Suso, Isco, En-Nesyri.

Borussia Dortmund XI: Meyer, Meunier, Sule, Schlotterbeck, Guerreiro, Can, Bellingham, Ozcan, Adeyemi, Brandt, Moukoko.

Liverpool got back to winning ways yesterday with a crucial 2-0 win over Rangers - Trent Alexander-Arnold and Mohamed Salah were on the scoresheet.

But the drama was elsewhere in Group A as Napoli thrashed Ajax 6-1.

Tottenham were held to a 0-0 draw with Eintracht Frankfurt with manager Antonio Conte admitting they needed to be more clinical.

Bayern Munich were comfortable 5-0 winners over Viktoria Plzen and Inter Milan beat Barcelona 1-0.

Real Madrid, Paris St-Germain and Benfica - as well as Manchester City - are all aiming to make it P3 W3 tonight.

But they can't all do so as Benfica host PSG in Group H.

Real host Shakhtar Donetsk, who would leapfrog them at the top of Group F with a surprise victory.

Sevilla meet Borussia Dortmund in City's group and the other game tonight sees Juventus host Maccabi Haifa.

There are two early games with energy drinks teams at home - Leipzig v Celtic and Salzburg v Dinamo Zagreb.

Image source, Getty Images

It's a big night in the Champions League for Chelsea, who are yet to win in the group stages this season.

They lost to Dinamo Zagreb in their opening match and drew with Red Bull Salzburg at home last month.

Can they get a win in Milan tonight?

Manchester City are in good shape, having beaten Sevilla and Borussia Dortmund so far.

They come into tonight's game at the Etihad against Copenhagen off the back of the 6-3 win over Manchester United too.

The likes of Real Madrid, Borussia Dortmund, Paris St-Germain and Juventus are also in action tonight.