Sir Alex Ferguson believes the "unethical" manner of Mark Hughes' sacking by Manchester City could help trigger a Devon Loch-style collapse next week that opens the Barclays Premier League title door for Manchester United.

Although United beat Swansea 2-0 at Old Trafford, the margin of victory was not enough to suggest they will be able to overhaul City on goal difference on the final weekend. Instead, they will go to Sunderland hoping relegation-threatened QPR - managed by Hughes - can deny Manchester City victory at the Etihad Stadium

Hughes was dumped by City after a game against Sunderland in December 2009, with Roberto Mancini already lined up to replace him, and Ferguson said: "QPR need a point and they're fighting for survival. But Mark knows his job all right. He was sacked by City in a very unethical way and he'll remember that."

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