Both full-backs are high up the field for Bayern and Benjamin Pavard crosses from the deadball line, but luckily for Paris St-Germain the cross is over the head of Kingsley Coman, who was free at the back post.

Moussa Marega is flicked in behind but Antonio Rudiger gets the cross in.

Jorginho has to mop up again in the middle when Marega turns sharply.

Strong start from Porto. Chelsea haven't had much of the ball.

Bayern have opted for a high press and Joshua Kimmich lets Leandro Paredes know he's there with a crunching challenge in the opening 30 seconds, with the Bayern man lucky to not see yellow.

Kylian Mbappe races through for the hosts but drags a shot wide from the corner of the penalty area, but it would've probably been flagged offside anyway.

Ben Chilwell is closed down by Sergio Oliveira but it's eventually hoofed up field.

Kai Havertz is then caught in the air by Pepe's arm but it's no free-kick. Thomas Tuchel isn't too happy.

Porto go straight on the attack. Jesus Corona and Sergio Oliveira try to combine in the box - the latter with a backheel flick - but it's away by Chelsea.

And we're under way as well in Paris as the hosts look to hold on to their 3-2 first-leg success.

Off we go in Seville.

Rob Green
Former England goalkeeper on BBC Radio 5 Live

Thiago Silva will bring that element of control to Chelsea tonight - although we saw him during the previous tie, he certainly wasn't controlled watching on, jumping up and down in the stands on his own!

Porto will see the back three of Azpilicueta, Thiago Silva and Rudiger and think they really are up against it tonight.

Here come the players. Can Chelsea get the job done?

Image source, Getty Images

BBC Radio 5 Live

Tune in! We've got commentary on BBC Radio 5 Live.

Stephen: Expect a big reaction from Bayern tonight.

Simon Gleave, head of sports analysis, Nielsen's Gracenote:

After winning 2-0 at FC Porto in the first leg, Chelsea have 92% chance of progressing to the semi-finals according to our Euro Club Index, external.

Chelsea's chance of winning the Champions League has also increased of course, to its highest level yet (13%).

Image source, Gracenote

It was arguably the most intense one-on-one in German football in recent weeks. It took place not on any pitch but behind closed doors at Bayern Munich.

In one corner was Hansi Flick, the Champions-League-winning head coach. In the other was Hasan Salihamidzic, the sporting director and operating hand of Bayern's hierarchy.

Those not familiar with the club's inner workings might assume that all is happiness at Bayern, given the team's success. Instead, there is a power battle playing out.

Read more here...

Image source, Getty Images

Rob Green
Former England goalkeeper on BBC Radio 5 Live

I think Chelsea are more structured under Thomas Tuchel. Having the ball is also something he has brought to the team and it goes without saying, if you've got the ball, the other team are going to find it a lot harder to score.

He came from a base of 'we'll keep the ball, we'll get the chance and we'll back ourselves to score' and on Saturday it was the first time under Tuchel they had scored more than two goals. It looked a little bit contrived in attack and when you think like that, the opportunity is gone.

But now all of a sudden players like Mason Mount and Christian Pulisic, who are in form, are enjoying their football. They are doing stuff instinctively and are making runs off each other. It's very difficult for other sides to play against.

Only three of the last 50 teams to lose the first leg at home in a Champions League knockout tie have managed to progress - however one of these three did come against PSG in 2018-19, with Manchester United eliminating them in the last 16.

Chelsea

Chelsea manager Thomas Tuchel says "now is the time" for the club to win trophies.

"I am here to win games and as a result to win titles," said the German.

"This is what I demand of myself. Why should we now say any different - that we want to win in five years, three years or two years?

"Now is the time."

Paris-St Germain boss Mauricio Pochettino: "I agree that we've been better away from home. It is something we will have to look into at the end of the season but let's hope things start turning around tomorrow.

"It doesn't matter who is playing. It's a question of collective attitude. It's a challenge, being able to keep the ball and hurt the opposition.

"There will be moments when we will struggle and it's in these moments that we will need to show solidarity and solidity."

Image source, Getty Images

Sergio Oliveira has scored five Champions League goals for FC Porto this term, the joint-most in a season by a Portuguese player for a Portuguese club, along with Nuno Gomes in 1998-99 for Benfica.

The last player to score more in a European Cup campaign was Eusebio in 1967-68, also for Benfica (6 goals).

Image source, Getty Images

Bayern Munich will be looking to progress from a Champions League knockout tie after losing the first leg for the first time since 2014-15 (v Porto in the quarter-finals).

The German side have been eliminated in each of the last four instances when losing the first leg, with all four coming in consecutive seasons between 2014-15 and 2017-18.

Image source, Getty Images

Chelsea boss Thomas Tuchel makes three changes from the side that earned the Blues their 2-0 'away' victory in the first leg of the quarter-final a week ago.

N'Golo Kante returns to the starting line-up after making substitute appearances against Porto and Crystal Palace following a hamstring injury. Christian Pulisic also comes into the team, along with a surprise selection for Thiago Silva.

Sergio Conceicao has decided on just the one change to his Porto starting XI for tonight’s second leg in Sevilla.

Sergio Oliveira replaces Luis Diaz in midfield for the Portuguese side.