The Glasgow Warriors had to fight off a late comeback by Racing 92 to be the first team to qualify for knockouts, securing a 29-19 bonus point win at Scotstoun.
Returning to the starting lineup, George Horne finished off a flowing move for the hosts after two-and-a-half minutes to lead 07-00 following a conversion by George Horne.
With the try, scored following a slice through the middle, off a scrum, George Horne becomes Glasgow Warriors' leading try scorer in EPCR competitions.
Horne then had to go off for a head injury assessment, but his replacement Jamie Dobie got the Warriors' second try just before the 20-minute mark to extend the Warriors' lead to 12-00.
Winger Seb Cancelliere then added a third, finishing off some fast hands in the corner as the Warriors surged ahead.
Racing 92 did manage to string together some phases before halftime, with Antoine Gibert's cross-field kick caught and finished by Vinaya Habosi to get on the scoreboard. Tristan Tedder added the extra two points to cut the Warriors' lead to 17-07.
Just before the halftime break, Tuipulotu's super solo score extended the Warriors' lead to 22-07 and secured a bonus point try.
Rory Darge barged over after the break for the Warriors' fifth try, which Tom Jordan converted to extend their lead to 29-07 with twenty minutes still to play in the second half.
Racing 92 managed a second try with less than 10 minutes remaining, with prop Lee-Marvin Mazibuko powering over from close range. Tristan Tedder converted to cut the Warriors lead to 29-14.
Henry Arundell finished a brilliant break to close the gap to 10 points with three minutes to go.
Glasgow Warriors hosts held strong for a 29-19 win to leave Racing with nothing and march on to the knockouts a round early.
Scorers:
Glasgow Warriors: Tries: George Horne, Jamie Dobie, Seb Cancelliere, Sione Tuipulotu, Rory Darge. Conversions: George Horne, Tom Jordan.
Racing 92: Tries: Vinaya Habosi, Lee-Marvin Mazibuko, Tristan Tedder. Conversions: Tristan Tedder (2).
Teams
Glasgow Warriors: 15 Josh McKay, 14 Seb Cancelliere, 13 Huw Jones, 12 Sione Tuipulotu, 11 Kyle Steyn (c), 10 Tom Jordan, 9 George Horne, 8 Jack Mann, 7 Rory Darge, 6 Matt Fagerson, 5 Scott Cummings, 4 Gregor Brown, 3 Zander Fagerson, 2 Johnny Matthews, 1 Rory Sutherland. Replacements: 16 Gregor Hiddleston, 17 Jamie Bhatti, 18 Sam Talakai, 19 Alex Samuel, 20 Ally Miller, 21 Euan Ferrie, 22 Jamie Dobie, 23 Duncan Weir.
Racing 92: 15 Max Spring, 14 Vinaya Habosi, 13 Tristan Tedder, 12 Henry Chavancy, 11 Henry Arundell, 10 Antoine Gibert, 9 Clovis le Bail, 8 Maxime Baudonne, 7 Ibrahim Diallo (c), 6 Noa Zinzen, 5 Junior Kpoku, 4 Boris Palu, 3 Lucio Sordoni, 2 Feleti Kaitu’u, 1 Lino Julien. Replacements: 16 Diego Escobar, 17 Eddy Ben Arous, 18 Lee-Marvin Mazibuko, 19 Romain Taofifenua, 20 Hacjivah Dayimani, 21 Kleo Labarbe, 22 Dan Lancaster, 23 Dylan Idrissi.