The A-League match review panel has upheld a controversial decision to show a red card to Wellington defender Ryan Lowry in the Phoenix's 1-1 draw with Perth Glory.
Lowry was dismissed shortly after coming on as a second-half substitute when referee Adam Kersey was referred by the VAR to view footage of a challenge by the central defender on Glory winger Chris Ikonomidis.
The decision left Phoenix coach Mark Rudan fuming and the Phoenix lodged an application with the MRP to have the card dismissed as an "obvious error".
The panel dismissed the Phoenix's application and stood by the referee's decision despite Phoenix chief executive David Dome saying A-League boss Greg O'Rourke had indicated the use of VAR in that situation was a mistake during a chat between the pair on Monday morning.
Lowry will serve a one-match ban and miss the Phoenix's clash with Sydney on Saturday.
The MRP has also imposed a one-match ban on Brisbane Roar midfielder Stefan Mauk.
The attacking midfielder was shown a red card for a stoppage time challenge on Adelaide's Craig Goodwin during the Reds' 2-1 win over the Roar on Friday night.
Mauk was knocked unconscious making the challenge, with Roar players and coach John Aloisi furious with Adelaide players lifting the prone player from the ground.
Roar managing director David Pourre said the club accepted Mauk will miss Sunday's away trip to Newcastle.
"We are disappointed with the conduct of certain players from the home side and feel the match officials should have handled the situation better," Pourre said.
"However, we commend the actions of Adelaide United captain, Isaias, for his quick thinking in looking after the wellbeing of Stefan and ensuring the situation didn't escalate further whilst he was unconscious and prone on the ground."
The MRP did not look at an incident involving Mauk and Adelaide's Taylor Regan where the Adelaide player received a second yellow card for gouging at the face of Mauk earlier in the Reds' victory.