"As I said, the minute they play a proper team this is what is going to happen. Half-decent teams are scoring goals against them; proper teams will batter them."
Those were the words that escaped Gary Neville's lips on the gantry as Mohamed Salah celebrated his second and Liverpool's fourth goal in their 5-0 win at Old Trafford back in October. It was the second time in eight days that Manchester United had conceded four goals in a game, following their 4-2 drubbing at Leicester City just over a week earlier, and there was still another 45 minutes left to play.
Salah, of course, sealed his hat-trick five minutes into the second half to complete the demolition job, condemning United to their joint-worst Premier League home defeat and one of the darkest days in their history. Since that harrowing afternoon, United have conceded four goals in a game on two further occasions, the latest coming in Sunday's derby defeat to Manchester City.