David Moyes has admitted that his replacement at Everton, Roberto Martinez, has done "a very good job" at Goodison Park.
While United have been inconsistent under Moyes's management, Martinez has guided the Toffees to fifth in the table, having lost just once.
"He is doing a very good job," Moyes told reporters. "He has very good players there.
"I always told them they could play without a manager because they are very well organised, but Roberto is doing a really good job keeping it going."
Moyes never won at Old Trafford during his 11-year tenure with the Merseysiders.