Hill and the film’s director talked about the time a team of college basketball players beat Michael Jordan, Larry Bird and Magic Johnson — and...

In tournaments, the old balls are swapped for new ones after several games. Those livelier new ones can change a player’s strategy.

The practice was long banned, but a change in the rules has permitted hand signals and some talking.

Coaches say winning quicker rallies is crucial to winning matches. It’s “the No. 1-indicator of winning and losing.”

It is usually the most powerful, but that greater strength may also be its greatest weakness. It can break down under pressure.