Happy Family (2006) on Netflix

Thijs is a ripe-age Dutch tomato grower. His adult daughters plan to have him move in a skyscraper-flat, leaving home and professional life, but he takes his adolescent (half-)Moroccon grandson Omar's advice to refuse and keep living. Thijs even lets the cheerful rascal coach his love-life, which lands him on a blind date with Jacky, an energetic Flemish woman, who won't take no for an answer but turns up at his door-step till he consents, and soon drags him into evening life, preparing for a dance contest. Soon after Omar turns up, listless and lazier then ever, runaway from school and home. The obvious reason for the horny hound's hanging head is a girl: Mergal is foxy, Turkish and as smitten as he, but her burly big brother Erhan will only allow a boy to go steady with her who has proven himself his better on the field in the traditional manly sport of oil-wrestling. Now Thijs, in his day a 'dry' wrestler, resolves to return the kid's favor by coaching down-beaten Omar back to life to the full, although the decisive match is in a few days, like the contest, and the unathletic novice pupil still has nothing to show for his cockiness...