Member of the breakaway of the day made up of nine riders, the rider from Intermarché was one minute ahead of Simone Battistella (Astana) in the final climb of Les Praeres (first category), short but very steep (4 km and slopes up to 'at 24%).
Eighth in the Tour de France in July, Meintjes won his first stage victory in a grand tour, aged thirty.
It is the fourth time in five days of racing that a member of the breakaway has managed to resist the return of the peloton to win the stage.
The wearer of the leader's red jersey Remco Evenepoel (Quick-Step), who distanced himself from his competitors on the final climb, finished fourth in the stage, 1 minute and 34 seconds behind the South African.
The "little cannibal" improves his lead in the general classification with now more than a minute over his runner-up Enric Mas (Movistar), still one of the only team leaders to be able to follow him on Sunday, and 1 minute and 56 seconds over the triple title holder of the event Primoz Roglic (Jumbo).
© 2022 AFP