The FA has asked Sir Alex Ferguson for his observations after he criticised assistant referee Simon Beck during Sunday s 1-1 draw with Tottenham.
The Manchester United boss described the linesman s performance as shocking and slammed Beck s failure to award a penalty to Wayne Rooney after seeing his side concede a 90th-minute equaliser.
Tottenham s late goal from Clint Dempsey meant United s lead at the top of the Premier League was cut to five points, following Manchester City s victory over Fulham.
The 71-year-old also claimed that Beck had failed to spot that a Didier Drogba winner at Old Trafford back in 2010 was offside a result which effectively handed the title to Chelsea that season.
Ferguson now has until 18:00GMT on Thursday to respond to the request and could face sanctions including a touchline ban or fine.
The Red Devils boss was recently criticised for berating referee Mike Dean at half-time during his side s 4-3 win over Newcastle on Boxing Day.
However, on that occasion, no action was taken by the FA.
