Kieran Trippier has slammed the repeated use of Video Assistant Referee (VAR) in the 6-1 win over Rochdale, as he feels it killed their momentum.
The defender was involved in a first half, in which referee Paul Tierney paused the game for lengthy periods to consult the VAR.
After Lamela had a goal ruled out by the technology, Trippier was awarded a penalty after VAR, but the resulting kick was cancelled as Son was adjudged to have staggered before taking it.
Lucas Moura also had his shout for a penalty cancelled, after VAR intervention and Trippier hopes it gets better.
“It was crazy,” he said. “Obviously the decisions took some momentum out of the game but the referee has to make the decision so we have to wait.”
Rochdale manager Keith Hill took a sympathetic view, telling BBC Sport: “It’s complicated with VAR. It’s not fair on the referee.
“The fourth official was explaining to us what was going on but the referee needs a bit of help.
“It was confusing. Now I have been a part of what VAR is, I feel sorry for the referee. I think the decisions need to be explained to the crowd. The visuals need to be used better.
“I hope that eventually they explain it to the supporters.”