Result: Chelsea 0-1 Porto (2-1 agg) - late Taremi overhead kick not enough for Porto
Chelsea will face Liverpool or Real Madrid in semi-finals
Result: PSG 0-1 Bayern Munich (3-3 agg) - Choupo-Moting scores
PSG advance on away goals - holders knocked out
PSG will face Man City or Borussia Dortmund in last four
PSG 0-0 Bayern (3-2 agg)
A really enjoyable start to this one. PSG have a chance and Kylian Mbappe, in the penalty area but wide left, pulls it back for Neymar.
The Brazilian gets there ahead of Manuel Neuer but the Bayern number one has closed down the angle well enough and Neymar's shot is pushed over the top.
PSG 0-0 Bayern (3-2 agg)
Good play from Bayern. Jerome Boateng steps out of defence and plays it to Eric Maxim Choupo-Moting and he produces a nice around the corner flick to Leroy Sane.
The Germany international is free 20 yards out and curls it at goal, but just wide.
Moments later Joshua Kimmich has another chance for the visitors but again drags it wide from outside the penalty area.
Chelsea 0-0 Porto (agg 2-0)
Kai Havertz is away down the right but Pepe puts a really good block in.
That all came from N'Golo Kante again. He's started well.
Chelsea 0-0 Porto (agg 2-0)
Rob Green
Former England goalkeeper on BBC Radio 5 Live
Chelsea are playing out from the back just a fraction too slow at the minute. It's a little bit laboured, which is inviting that pressure from Porto.
Thomas Tuchel is looking a bit agitated on the touchline...
Chelsea 0-0 Porto (agg 2-0)
60% possession for Porto so far. No shots on target from either side.
PSG 0-0 Bayern (3-2 agg)
Bayern have clearly targeted the PSG full-backs and the dangerous Kingsley Coman wriggles free on the left, but it's good defending from Danilo Pereira who is in the right place to put the cross behind for a corner. That comes to nothing.
Chelsea 0-0 Porto (agg 2-0))
Rob Green
Former England goalkeeper on BBC Radio 5 Live
It's not exactly comfortable for Chelsea at the minute - but you'd rather be two goals up than two goals down!
Porto are just pressing the life out of Chelsea and they know they have got to get a goal from somewhere, they have to create something.
They are probably desperate to get that goal in this first 20 minutes.
PSG 0-0 Bayern (3-2 agg)
Di Maria then gets involved soon after and tries to lift a ball over the top of the Bayern defence for Neymar, but the ex-Manchester United man gets too much on it and it drifts harmlessly into the gloves of Manuel Neuer.
PSG 0-0 Bayern (3-2 agg)
Bayern's Alphonso Davies on the left wing slips and is dispossessed by Angel di Maria, with Davies sliding in to try to win the ball back.
But Di Maria lands awkwardly and needs some medical attention. Some magic spray on the knee and he's able to get back into the action, although he's still limping a bit. One to monitor.
Chelsea 0-0 Porto (agg 2-0)
N'Golo Kante does well on the left for Chelsea. He lays it inside to Christian Pulisic, who tees up Reece James.
He drills it across goal but skews it slightly. Decent build-up from Chelsea though.
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John Arundell: Chelsea have soaked up initial pressure from Porto and slowly getting into it.
Chelsea 0-0 Porto (agg 2-0)
Rob Green
Former England goalkeeper on BBC Radio 5 Live
Porto are working so hard in this first half. Christian Pulisic picked up the ball and he was instantly swarmed by players around him.
Chelsea 0-0 Porto (agg 2-0)
Otavio's cross isn't great from the right after some nice work from Jesus Corona.
Porto have been using the space down that side.
Chelsea 0-0 Porto (agg 2-0)
Porto are still working very hard to close the ball down. Chelsea still haven't really got going.
PSG 0-0 Bayern (agg 3-2)
David Alaba leaves the foot in on Neymar, with the Brazilian spending some time on the ground, before getting to his feet a bit gingerly. PSG fans will be hoping it's nothing serious.
No spectators in this one, but loads of fireworks going off outside the Parc de Princes.
Chelsea 0-0 Porto (agg 2-0)
What is Edouard Mendy doing?
Antonio Rudiger lays it back to his keeper. He passes it straight to Jesus Corona!
Jorginho reacts well to put pressure on him and deflects the strike out for a corner.
PSG 0-0 Bayern (agg 3-2)
Leroy Sane is already seeing a lot of the ball on the right wing for Bayern. He jinks inside on to his left foot and tries to play a one-two with Kingsley Coman, but Colin Dagba is in the right place in the PSG defence to deny the ex-Manchester City man a shot at goal.
Chelsea 0-0 Porto (agg 2-0)
Reece James manages to squeeze a cross in from the right but it's comfortable for the keeper.
Chelsea 0-0 Porto (agg 2-0)
Rob Green
Former England goalkeeper on BBC Radio 5 Live
Porto are pressing really hard but you wonder how long they can keep this up for?
Chelsea will have to stay with cool heads and realise that Porto cannot do this for an hour - but Porto do seem to realise how important the first goal will be in this game.
Chelsea 0-0 Porto (agg 2-0)
Christian Pulisic finds the feet of Mason Mount and sprints on the overlap to create a distraction.
Mount takes the shot on but is deflected out for a corner.