I swear I saw this on Transworld Sport about twenty years ago. It was a tennis-like game, using a football (soccer) ball. The players had to stay on their bikes, doing wheelies to catch the ball and flick it back.
I've never seen it since. The closest I could find was more like polo (with bikes and footballs).
Surely someone else has seen it?
(I wanted to create tags sport-identification and obscure, but don't have the points.)