Aston Villa manager Steven Gerrard criticised the decision to award Mohamed Salah a penalty on his return to Anfield on Saturday.
Gerrard had an unhappy return to Liverpool as his Villa outfit were beaten 1-0 thanks to a second-half penalty from Salah.
The Egyptian went down under the challenge of Tyrone Mings for the penalty, but Gerrard felt Salah committed the first foul.
"I thought Liverpool were better in terms of general play. Their style was better than ours, but we've done so well to contain them for large periods.
"Ultimately the game has been decided by a penalty. There were two penalty incidents in the game, Liverpool got theirs – if you look at that one, Salah fouls Mings first.
"It's always hard to take when you lose football matches. We knew it was going to be a containing job. You have to ride the first 20-25 minutes against sides like this. We finished the game stronger, with more belief and some good opportunities.
"If an arm goes anywhere near Alisson, it's a foul. So why isn't a foul given for Danny Ings? They are the questions I'd like answering, but I can't answer them right now.
"In hindsight I should have thrown a bit more at it a bit earlier, but you have to be careful Liverpool don't hit you for two, three or four. We've lost to a soft penalty because if you watch it properly, Tyrone's been fouled first. The disappointing thing is that the referee hasn't gone to look at it."
