Manchester United have been warned they could face a long wait to win another Premier League title.
The Red Devils haven't lifted the trophy since 2013 - Sir Alex Ferguson's final year at the Old Trafford helm.
United have struggled to even cement a place in the top four since and finished last campaign in sixth spot - 32 points behind champions Manchester City .
Ole Gunnar Solskajer's side already trail leaders Liverpool by 12 points this time around after just seven games.
And former United forward Dimitar Berbatov has fired a warning to his former club.
He told Betfair : “It is frustrating and difficult for me to admit that United are so far behind Manchester City and Liverpool.
“When it comes to playing the game, you can see how confident and calm on the ball they both are, they know how to play and sometimes United don't have that and they suffer because of that.
“I hope that Manchester United don't end up like Liverpool and wait at least 29 years for the title. Six years is a long time to wait to win a title for a team like Manchester United.
“When you get into that spiral you are going to start slowly losing your DNA, look at Liverpool and all those years, you don't want that.
"Sure, Liverpool are playing better now, but it has taken them so long to get to this point now where they are playing great football.
"United need to find that winning formula as soon as possible.”
