Former pro Dan Lobb’s perky documentary follows the irrepressible athletes as they compete for glory in their age groups’ world championships

Three sinewy octogenarians and one unfeasibly hale-looking nonagenarian are the focus of this perky documentary looking at tennis players still holding their own in a late tiebreak with father time. A mixture of ex-pros and dogged late starters who picked the game up in middle age, they all converge at the International Tennis Federation senior world championships in Croatia; a tournament with more matches than Wimbledon. As serial winner King van Nostrand – a former maths teacher who was 85 at the time of filming – points out, small margins of age count; at a given point, a younger player of inferior ability will statistically start beating their older betters.

A stooping Floridian with a rapier grin, Van Nostrand has dominated the seniors circuit winning a record-breaking 43 titles and is still not tired of winning.