He doesn't think the big defender, who will be 28 in June, is too old to be considered for international football.
Deano has been a rock at the back since being brought in by Glenn Hoddle from Southampton in Septemeber.
In-form Les, on target again at Villa Park, said: "Dean has been fantastic for us. He's come in and settled in so quickly and he's looked as if he has been playing in our back four for more than half a season.
"It was important that we stressed to him as players, and also the management, that he was not Sol's replacement.
"If people want to make comparisons between him and Sol, then that's up to them but it is unfair without a shadow of a doubt.
"He's here to do a job as Dean Richards, to do a job for Tottenham and to defend the way that he knows how to defend and he has responded very well.
"I definitely believe Dean can make a challenge for the World Cup squad. People are saying 'he's too old,' but that's rubbish and the England squads are picked on how well you are performing.
"If you look around the country at English defenders, then Dean is doing as well as any of them. There are always one or two players who sneak into World Cups via the back door."
Les Ferdinand believes Dean Richards can make a late bid for England's World Cup squad.