Fuming Graham Alexander accused Hibs of "manhandling" referee Willie Collum as he felt forced to hold back in his criticism of the official.
Motherwell saw Bevis Mugabi sent off inside the first minute of their Scottish Cup quarter-final, and despite a valiant effort lost the match 2-1.
Alexander has been critical of officials in the past and could have been expected to launch a furious tirade on full time.
