Rio Ferdinand issues 'nightmare' Man City and Liverpool FC warning to Manchester United

Rio Ferdinand believes it would be a "nightmare" for Manchester United if Liverpool and Manchester City were to share all four trophies they have competed for this season between them.

The former United man made the admission after City joined Liverpool in booking their place in the quarter-finals of the Champions League on Wednesday evening. City were held to a goalless draw by Sporting Lisbon at the Etihad Stadium but progressed after winning the first-leg 5-0 in Portugal last month.

Liverpool qualified for the quarter-finals after edging past Inter Milan just 24 hours earlier. They lost the second-leg 1-0 at Anfield but went through 2-1 on aggregate after their first-leg win in Italy.

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It means that Liverpool's hopes of winning the quadruple this season are still alive, following on from their Carabao Cup triumph against Chelsea almost a fortnight ago. City, meanwhile, can still complete a treble themselves and deny Liverpool any further silverware, with the Blues still pursuing the Premier League title, the FA Cup and the Champions League.

With the two Premier League clubs amongst the favourites to win Europe's premier club competition, as well as the FA Cup, Ferdinand has outlined how damaging it could be for United to see their two biggest rivals dominate every competition.

"That is such a worst case, worst case," Ferdinand told BT Sport. "That's the worst scenario I can imagine, Liverpool and City sharing all four of the trophies. It would be a nightmare [for United].

"I can't [see anything other than that]. I think Bayern Munich are the only team that could stop that, and that's a big if.

"I agree