In a crucial relegation encounter in the Bundesliga, Winkmann blew the half-time whistle with the game goalless.
However, as the players headed off, the official consulted VAR after a late incident inside the penalty box.
European Round-Up: 10-man Athletic draw with Granada, Stuttgart beat Mainz
26/11/2021 AT 22:58
After VAR noticed Freiburg defender Marc-Oliver Kempf had blocked a shot with his arm, the referee duly awarded Mainz a penalty – though they could not take it until the Freiburg goalkeeper had come back from the dressing room.
Eventually, Alexander Schwolow made his way back onto the pitch, but conceded the spot-kick to Pablo de Blasis in what turned out to be the 52nd minute of the first half.
Cue the toilet roll protests at half-time.

Mainz v Freiburg

Image credit: Eurosport

VAR is set to be used at the World Cup, though Premier League clubs decided against using it in the 2018-19 season after deeming that more testing was required.
Table-topping Bayern reassert dominance by inflicting first defeat on third-place Freiburg
06/11/2021 AT 13:39
European round-up: Athletic Club suffer home defeat to Cadiz; Gladbach draw at Mainz
05/11/2021 AT 22:56