The back-rower joins brother Zander in reaching the century mark, becoming only the third set of brothers – following the Bullochs and Hornes – to reach the milestone in Glasgow colours.
Fagerson is one of seven changes to the starting XV that ran out in Cork last weekend, as Franco Smith’s men prepare to open their campaign – and indeed the competition overall – against the high-flying English outfit.
Jamie Bhatti and Zander Fagerson come into the starting front-row, packing down either side of Johnny Matthews to make it an all-international trio.
Richie Gray returns after being rested for the trip to Munster last time out, coming into the second-row to partner Sintu Manjezi, who makes his Investec Champions Cup debut for the Warriors.
Gray’s inclusion sees Scott Cummings shift to the blindside flank, where he joins impending centurion Fagerson and Rory Darge in the back-row triumvirate.
Behind the scrum, Tom Jordan is another to make his first appearance for Glasgow in Europe’s top tier, whilst Sean Kennedy runs out for his first Investec Champions Cup outing in Glasgow colours since 2012.
Huw Jones returns from injury to start at outside centre, joining captain Stafford McDowall in the midfield for the first time since the BKT URC Round Two clash away to Connacht.
Having made more clean breaks than any other Warrior this season, Sebastain Cancelliere returns to start on the wing in an otherwise unchanged back three, meaning Ollie Smith and Josh McKay once again start in tandem in the back-line.
The club’s two most recent debutants could each make their European debuts off the bench tomorrow night, after Max Williamson and Ben Afshar were both selected in the matchday 23 for this weekend’s clash.
An all-international trio of front-rowers provide cover at the coal-face, with George Turner joining Oli Kebble and Lucio Sordoni amongst the replacements.
Sione Vailanu rotates to the bench after an all-action showing against Munster last weekend, whilst Ally Miller comes into the matchday 23 as part of a six-two split of forwards and backs.
The replacements are rounded out by Ross Thompson, the fly-half coming into the squad for the first time since coming off the bench at home to Benetton just over a fortnight ago.
