Call this a new kind of love-love for tennis star Genie Bouchard ... TMZ Sports has confirmed she's now dating Pittsburgh Steelers QB Mason Rudolph!!!
A source close to the couple tells us the two began a romantic fling recently ... and have gotten pretty serious.
In fact, 26-year-old Genie was just spotted at a fancy restaurant in Pittsburgh this week ... posting a pic of her at the place with the caption, "Pitt stop."
25-year-old Mason -- who was presumably on the other end of the camera -- dropped a "like" on the photo.