There was a movie I saw in the 70's or 80's that opened with some typical hoodlum types heading for a fight/rumble at a basketball court. One of them broke the antenna off a car and it was used to stab one of their opponents.

For years I've been trying to remember what the movie was, but nobody I talk to remembers. Any ideas?

Possibly THE WARRIORS 1979 been a long time since I've seen it can't quite remember the opening scene

The outsiders?

Unfortunately, it's not either of those. Thanks though.