Heerenveen boss Robin van Persie was left exasperated after match officials mistakenly allowed Fortuna Sittard to field 12 players against his side on Saturday.
The incident took place in the 88th minute with Heerenveen 2-1 up, when Fortuna made a double-substitution that saw Ryan Fosso and Jasper Dahlhaus come off for Darijo Grujcic and Owen Johnson. However, Dahlhaus didn't step off the pitch and played for nearly a minute.
Van Persie noticed the man advantage to Fortuna and protested on the sidelines before Dahlhaus eventually came off.