Ralf Rangnick was surprised by the linesman's decision to disallow a goal in Manchester United's draw with Burnley.
United were 1-0 up when Paul Pogba was adjudged to have impeded Erik Pieters just before Marcus Rashford's cross was bundled into his own net by Josh Brownhill.
Although Pogba was involved in a physical duel with Pieters, the midfielder was still disgruntled by the decision and remonstrated with the official at half-time.