"Now they are with new teams and playing well. You have to ask yourself if it is not the players that are bad but if something is wrong with the trainer."
Rebrov made just 37 Premiership starts after arriving from Dynamo Kiev in summer 2000.
Meanwhile, Coventry player-manager Gary McAllister, whose side entertain Spurs in the Carling Cup tomorrow night, believes Spurs have pushed the panic button.
He said: "It shows the pressure managers are under as people are being sacked after five or six games of a season. Glenn's had to incorporate new players into the squad. Yet the decision has been made after a few games.
"My respect for Glenn won't change. To midfield players of my generation, Glenn was their favourite. This won't change that."