I didn't hear it but doesn't surprise me. A low class chant like that is par for the course at sporting events.
But the alltime most hysterically ignorant and incompetent chant is "overrated, overrated..." Brilliant. You're trampling some team but in the process you are determined to diminish your own achievement by asserting the other team is less than its reputation. Gee, I think tomorrow I'll barge into my boss' office and tell him I don't deserve a raise or any praise in the future, since it's not a case of me being any good, just that my co-workers are remarkably inept and much worse than he believes.