Luke Shaw is a strange old situation. We eagerly await Jose Mourinho's post-match assessment.

Remember this one?

Graham Ball: Over three years to make 50 appearances? There is something wrong with Luke Shaw's commitment obviously!!

Tom: Feeling oddly emotional that Luke Shaw is playing tonight, feel for him so much since his leg break and subsequent removal from the first team picture at Man U, hope they let him go in January!

BBC World Service

Former Atletico Madrid and Liverpool forward Florent Sinama-Pongolle: "If Atletico is not going through it will be very difficult for the fans who are used to being in the last quarter or even the final for the last five or six years.

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"A coach like Diego Simeone, you can deal with for two years at top intensity every single day but after that these coaches burn you out, you need something fresh because it’s so demanding every day, the discipline, the tactical aspects, the physical aspects, you have to make sacrifices on your personal life.

"You have to be able to sometimes forget about football but with these type of coaches it’s impossible. When you see the squad of Atletico Madrid it hasn’t changed that much for the last four or five years, Simeone is a very intense coach."

Juventus goalkeeper Gianluigi Buffon misses out through injury for the Italian side, as they look to secure the victory away at Olympiakos that would take them into the last 16.

Incredibly, that is the first Juventus Champions League match the 39-year-old has missed in nine years, with ex-Arsenal keeper Wojciech Szcesny between the sticks.

A win takes Juve through.

As Charles refers to, the other game in Chelsea's group could well be important.

Roma will go through with a win, or if Atletico fail to win at Stamford Bridge. If Roma win and Chelsea do not, Roma win the group.

Nii: Chelsea team news. Bakayoko again! Hope he proves me wrong today, but I can’t see what he brings.

Charles Fairweather: Hoping Chelsea can put the mattress-makers to bed tonight. Feel like events in Italy will dictate this game though.

Simon Stone
BBC Sport at Stamford Bridge

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Antoine Griezmann will spearhead the Atletico attack tonight but will this be his last Champions League game for the club?

Manchester United have coveted the France forward for a few years and there has been talk that Real Madrid may move for him in the summer.

He did sign a five-year contract in June but it contains a 100m Euro release clause.

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PSG have the opportunity to win all six of their Champions League group games, a feat which has only been accomplished six times in the past, the most recent being Real Madrid in 2014-15.

PSG have scored 24 goals in five games this season (and conceded only one), already a record in a Champions League group stage. They are also the only team, alongside Atletico Madrid and Barcelona, yet to concede a goal away from home in the competition this season.

Barcelona*, Bayern Munich, Besiktaş*, Chelsea, Manchester City*, Paris St-Germain, Real Madrid, Tottenham Hotspur*

(*group winners)

Chelsea

Just three changes from the team which beat Newcastle - in come Davide Zappacosta, Gary Cahill and Tiemoue Bakayoko for Marcos Alonso, Antonio Rudiger and Danny Drinkwater.

Cristiano Ronaldo may have only scored two La Liga goals this season, but he is top of the Champions League charts.

He has scored twice in both matches against Apoel Nicosia, grabbed a further two goals in the 3-1 away win against Borussia Dortmund and netted once in both of Real Madrid's games versus Tottenham.

Neymar could close in tonight.

Image source, .

Patrick Jennings
BBC Sport at Old Trafford

There were a few sizable intakes of breath from the Russian journalists inside Old Trafford when we found out the country has been banned from the 2018 Winter Olympics.

One had matched his rather fetching moustache with a Sochi 2014 jacket in special anticipation of the landmark International Olympic Committee decision.

That's the Games where Russia is said to have operated a "systemic manipulation of anti-doping rules" - one that is supposed to have involved secret service agents whisking away positive samples through holes they had drilled in testing laboratory walls.

Disappointment but not necessarily surprise, seems to be the reaction here.

Ex-Chelsea players Fernando Torres and Filipe Luis are both named in the starting XI by Atletico boss Diego Simeone.

BBC Sport app users may need to click on the link to see the tweet.

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The Belgians have not won an away game in the Champions League since December 2005. Their away record since then is D8 L6.

Fernando Torres is starting up front against his old club tonight, Atleti must have arrived safe and sound.

More when we get it...

Still no team news from Chelsea. I haven't heard anything about a delayed kick-off but will of course alert you of any changes.

Presumably they would have to hold up Roma v Qarabag too? Logistical nightmare.

So tonight is a rare chance for Luke Shaw to show Jose Mourinho what he is made of, with his first appearance since 24 October.

The 22-year-old has only had 48 minutes of playing time this season, coming on as a half-time substitute in the 4-1 win over Championship Burton Albion in the third round of the Carabao Cup, and then as an 87th-minute substitute in the 2-0 win over Swansea in the fourth round.

Today is his 50th appearance for Manchester United, but it has taken him a long time to reach that figure having joined in June 2014 in a £27m move from Southampton.

BBC Sport app users may need to click on the link to see the tweet.

Patrick Jennings
BBC Sport

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Have you got your tree up yet?

I can't quite get to the bottom of where this one came from - no-one around here seems to know.

My best guess was Norway but it's been suggested it could be artificial. You'll struggle to get that in the loft come New Year.

Image source, Getty Images

As manager, Jose Mourinho has faced CSKA Moscow seven times in the Champions League, winning six and drawing one.

He is one of five managers to have won the European Cup/Champions League with two different clubs, alongside Ernst Happel, Ottmar Hitzfeld, Jupp Heynckes and Carlo Ancelotti.

Manager Brendan Rodgers wants to end Celtic's Champions League campaign with a win against Anderlecht.