It sometimes seems surprising that tennis doesn’t inspire more movies. Its one-on-one gladiatorial clashes are inherently dramatic and psychological, while the devious scoring system means no match is ever lost until it’s lost. Nail-biting climaxes and last-minute turnarounds are baked into the design. On the other hand, the fast-moving, seesawing action is technically difficult to frame in a way that’s both exciting and legible — and that same scoring system might drastically confuse anyone who doesn’t follow the sport.