Postpublished at 43 mins
Saracens 13-14 Ospreys
Luke Morgan's short run is ended by a you-shall-not-pass tackle from Mako Vunipola that must feel like running into a brick wall.
Saracens overcome Ospreys to reach European Champions Cup quarter-finals
Ospreys led at half-time but Saracens scored three tries in second half
Saracens travel to champions La Rochelle next Sunday
Exeter Chiefs beat French champions Montpellier on try countback to reach last eight
Chiefs score converted try in final minute of extra time to level incredible match 33-33
Montpellier's English number eight Zach Mercer sent off in second half
Exeter host South African side Stormers on Saturday
Tim Oscroft and Mantej Mann
Saracens 13-14 Ospreys
Luke Morgan's short run is ended by a you-shall-not-pass tackle from Mako Vunipola that must feel like running into a brick wall.
Saracens 13-14 Ospreys
Mako Vunipola goes careering through the Ospreys defence, but the move breaks down when brother Billy can't hold a pass with a move down the right flank in the offing.
Saracens 13-14 Ospreys
OK, here we go, the last 40 of the last-16 is under way...unless we get more extra time malarkey.
It's 12-6 to Toulouse against the Bulls at the break, by the way.
Saracens 13-14 Ospreys
It's not been a bad weekend of Champions Cup rugby has it? More twists and turns to come today, I think.
Saracens have been against it in the first half but they trail by a single point at the break.
We're all set for a thriller in the second half.
Max Malins (con Owen Farrell)
Has Max Malins got over for Saracens' first try of the game?
He is dragged down just short of the line but he has enough momentum to stretch out his arm and ground the ball on the whitewash.
It's a clinical finish by the England wing and Owen Farrell adds the conversion.
Saracens 6-14 Ospreys
Dan Lydiate is on for Justin Tipuric, who appears to be struggling with an injury.
Saracens 6-14 Ospreys
Keiran Williams has had a brilliant half but he will spend 10 minutes in the bin.
He doesn't release Ben Earl after making the tackle but maybe that is a harsh call to go straight to a yellow card.
Owen Farrell
Saracens win the penalty from the scrum and Owen Farrell bangs the ball over the posts.
The lead is reduced to eight points.
Saracens 3-14 Ospreys
A knock on close to the line means the Ospreys can clear their lines.
The south Wales side have some following in London and they are making plenty of noise.
Saracens 3-14 Ospreys
As expected, Saracens are bringing the heat now as they look to gain a foothold in this game.
They are penned on the Ospreys line and win the penalty for offside.
They will come again.
Saracens 3-14 Ospreys
Ethan Roots is charged for this.
The Ospreys flanker sets off after the big up and under and gives Alex Goode a shove after he claims the ball.
Saracens fly in off their feet to try and protect the ball and Ospreys have the penalty.
Keiran Williams (con Owen Williams)
Ethan Roots smashes Nick Tompkins in midfield and the Ospreys gather the ball and are up and running.
Justin Tipuric gets through the Sarries defence and the ball is recycled for Keiran Williams to ground the ball in the corner.
Owen Williams adds the conversion and the visitors are flying.
Saracens 3-7 Ospreys
Ospreys are playing with a real freedom in the north London sunshine.
Saracens are looking to unlock the door but they have been kept out thus far.
Saracens 3-7 Ospreys
Jamie George is denied again when it looks like Saracens are in.
Maro Itoje makes the initial break and Owen Farrell shows deft hands to feed George out wide but the hooker drops the ball as he is tackled by the last defender Keiran Williams.
Great defence.
Saracens 3-7 Ospreys
Jamie George thinks he has got over for an instant response by Saracens but has he got the ball down?
All of the camera angles favour the Ospreys and there is no evidence to award the try. The visitors can clear their lines with a drop out.
Michael Collins (con Owen Williams)
What a reply.
Keiran Williams makes the break in midfield and feeds Michael Collins for a run in.
Owen Williams adds the conversion for the Ospreys.
Owen Farrell
Never in doubt from five metres out. Owen Farrell kicks Saracens in front.
Saracens 0-0 Ospreys
Penalty to Sarries. Owen Farrell points to the posts and he won't miss from straight in front.