French referee Pascal Gauzère is waiting for the call...

And Stuart Hogg gets us under way...

A quick reminder of the teams before we get under way.

Saracens: 15. Liam Williams,14. David Strettle,13. Nick Tompkins,12. Brad Barritt (capt), 11. Alex Lewington, 10. Alex Goode, 9. Ben Spencer; 1. Mako Vunipola, 2. Jamie George, 3. Vincent Koch, 4. Maro Itoje, 5. George Kruis, 6. Jackson Wray, 7. Schalk Burger, 8. Billy Vunipola.

Replacements: 16. Christopher Tolofua, 17. Richard Barrington, 18. Christian Judge, 19. Will Skelton, 20. Calum Clark, 21. Richard Wigglesworth, 22. Alex Lozowski, 23. Mark Gallagher.

Glasgow: 15. Stuart Hogg, 14. Tommy Seymour, 13. Nick Grigg, 12. Sam Johnson, 11. DTH van der Merwe, 10. Adam Hastings, 9. Ali Price. 1. Oli Kebble, 2. Grant Stewart, 3. Siosiua Halanukonuka, 4. Tim Swinson, 5. Jonny Gray, 6. Rob Harley,7. Chris Fusaro,8. Ryan Wilson (capt).

Replacements: 16. Kevin Bryce, 17. Alex Allan, 18. D'Arcy Rae, 19. Adam Ashe, 20. Matt Smith, 21. George Horne, 22. Huw Jones, 23. Niko Matawalu,

Referee: Pascal Gauzère (France)

Glasgow head coach Dave Rennie has made it crystal clear what is required from his side - who lost 13-3 in the return fixture, but competed well up front - if they are to get any joy in north London.

"We are going to have to be brutal," says the New Zealander. "It is going to be a really physical encounter and we need to be sharp.

"You don't get many opportunities against a side like Saracens so we are going to have to take them."

Image source, Getty Images

Some significant late team news, with Saracens fly-half Owen Farrell withdrawn from today's game with a wrist injury.

Farrell is having a minor surgical procedure today, with Sarries boss Mark McCall saying the recovery period is 7 to 10 days.

England face Ireland in Dublin in their Six Nations opener a fortnight today, so Farrell should - should - be fit for that.

As for today, Alex Goode moves from full-back to fly-half for Sarries, with Wales' Liam Williams switched to 15, and David Strettle coming in on the wing.

Image source, SNS

With Edinburgh beating Montpellier at Murrayfield last night, Glasgow have joined Saracens in already sealing qualification for the last eight.

A Saracens win today would see them finish as top seeds in the quarter-finals, and could well mean them hosting Glasgow, who could finish eighth seeds, again in the last eight.

Motivation enough you'd think for Warriors, who were beaten 38-13 at Allianz Park at the same stage two years ago, the only previous occasion they have reached the quarter-finals.

With qualification secure, for Glasgow to finish top their most likely means of doing so will be to win with a bonus point and deny Saracens a losing bonus point.

The other scenario would require Warriors to win by more than 10 points (Saracens won the return fixture 13-3 at Scotstoun), so they both finish on 23 points, and have the same number of match points from their two games (four).

But the next criteria to determine the higher-ranked team is best aggregate points difference from the pool stage. Saracens start off with +85, and Glasgow +47, so Warriors would need to win by at least 20 points.

All clear?

Afternoon all. Calmed down from the excitement of last night yet?

From a Scottish perspective, it was a historic one, with Edinburgh's win over Montpellier guaranteeing Scotland two teams in the quarter-finals of Europe's elite club competition for the first time.

Glasgow are now guaranteed to be at least one of the three best runenrs-up, and still have a shot - a long one, admittedly - of denying Saracens top spot and a home quarter-final.

The English champions, who qualified last week after winning in Lyon, are unlikely to ease up with the carrot of finishing top seeds - and possibly hosting Glasgow again in the quarter-finals - in front of them.

Image source, SNS