Former West Ham boss Harry Redknapp is confident Frank Lampard will be ruthless with Chelsea's players if he needs to.
Redknapp, who has managed several English clubs including West Ham and Tottenham Hotspur, said Lampard would expect his players to give everything, both on match days and in training.
"He is the best trainer I have seen in all my years of football. I have never seen anyone work so hard on the training ground," Redknapp told Sky Sports.
"I am sure you can ask Jose Mourinho, you can ask Claudio Ranieri, you can ask anybody who worked with him - he trained like nobody you have ever seen.
"He will expect the same level of effort and commitment from the players at Chelsea. He will demand it. If he gets that, then Chelsea are in for a great time."
