Naturally the close link between the teams has caused plenty of competitive (but meaningful) chitchat around the St Mary's campus, with many of the Harlequins Under 20's studying at the university.
It is sure to be an exciting spectacle as friendships are put aside for 80 minutes as the teams compete for university and in some cases personal bragging rights!!
For St Mary's it will be a testing game as they prepare for the BUCS cup playoffs after having narrowly been defeated a fortnight ago by Northumbria University.
Gates open at 11.15am and admission is included with all match tickets for Harlequins v Catalans.
Tickets start from just £15 adults, £5 under 16's. Call 0871 527 1315 or click HERE to book online.
Finally there will be a free bus starting from 5.00 pm making two trips from the Stoop heading to the Redback Tavern in Acton for an aftermatch party.
So come on down to the stoop this Valentines day and join the party!