Great challenge from Zaidu Sanusi - many have ended up bringing Mo Salah down in that situation, but he stands up well and takes the ball off the Liverpool forward's toes.

Herrera isn't able to carry on. Danilo replaces him.

It's kicking off a bit now.

Ander Herrera sparks some ire by going down, but City opt to play on for an attack that fizzles. PSG are, as you might imagine, not pleased.

Great defending from Ruben Dias!

PSG are away on the counter. Three on three. Lionel Messi looks to shoot from a central position, but Dias sticks in his boot to stop him.

The game is opening up now.

What can Porto do to get back in this one? Getting the ball to Luis Diaz is a good ploy, but Takumi Minamino does well to pinch the ball off the Porto forward as he's shaping to shoot.

PSG are in the mood now. Lionel Messi, Neymar and Kylian Mbappe combine again but the latter's low ball at the end of the attack is blocked and the ball cleared.

That was an incredibly satisfying strike from Thiago. Such pure technique.

Gabriel Jesus battles his way past one tackle near the PSG box but is halted by a second, despite chucking in a couple of step-overs as disguise.

Luis Diaz bundles over Alex Oxlade-Chamberlain, and now it's Liverpool who can send a free-kick from deep into the area. A bit stop-start at the moment.

Pep Guardiola responds to the PSG goal by sending on Gabriel Jesus to bolster the attack. Oleksandr Zinchenko is the man replaced.

Dion Dublin
Former Manchester United striker on BBC Radio 5 Live

That is the danger. The combination of the three... Messi pings a cross and who is on the back post? Mbappe. It is so fast and decisive. They do nothing for so long but when the do something it is at such a pace that City couldn't live with it.

Now suddenly PSG look the side brim with confidence. They are in the City half, shifting the ball right and left.

Joao Mario wins a free-kick against Ibrahima Konate in the corner, decent chance for Porto to deliver in front of the away fans. It's a dangerous ball and Alisson can only punch out into his own box.

It falls to Mateus Uribe, who swivels smartly and drags a shot agonisingly wide. That was close.

Mehdi Taremi gets his head to a cross inside the Liverpool box but cannot steer it on target - first sighter in the second half goes Porto's way.

City pick up where they left off. Ilkay Gundogan flicks an effort over the onrushing Keylor Navas, with two PSG defenders having to track back to head away.

Looks like Gundogan was offside in the build-up, though.

We're back under way at Anfield after Porto's delayed entrance for the second half.

Too much to ask for a goal?!

For Man City it's a case of repeating that first-half display but with just a fraction more sharpness in attack. PSG surely can't survive another onslaught like the first 45 minutes again.

We go again.