There's the Red Sox and Yankees. Ali and Frazier. Duke and Carolina. And, of course, "South Park" versus Scientology.
Now comes what could be the most heated rivalry of them all: gays vs. Muslims.
A Dutch multicultural group is organizing a soccer tournament between gays and Muslims, hoping to counter what a study published on Thursday said was a rising tide of fear among gays.
An organizer of the group, Suzanne Ijsselmuiden, said she hoped the competition will "help ease these tensions so that people can openly talk about homosexuality."
Gay Muslims can take their choice of teams, she said. "People can have many identities."
For those gay Muslims participating, one piece of advice: wear a cup.