Sir Alex Ferguson urges the Premier League to block Zeki Fryers' move to Tottenham, accusing Spurs of "blatant manipulation" over the transfer.
Fryers left United for Standard Liege for a small compensation fee in August after Spurs baulked at paying £6m.
But now Spurs have signed the 20-year-old from Standard for a reported £3m. The north London club told BBC Sport they only made a second approach for Fryers after being made aware that the player was "homesick" in Belgium.
Ferguson is "disappointed" with Tottenham and says there is likely to be a "mobile trail" somewhere that the Premier League should examine.