After victory over Crystal Palace on Saturday, Cascarino believes that Tuchel needs to be credited with getting the best out of his current squad, and for his decision-making in the transfer market.
Speaking to talkSPORT, Cascarino said: “Pulisic played centre-forward yesterday, scored a goal and caused havoc.
“Alonso wasn't seemingly wanted anymore at Chelsea. Ends up being a player for them and was offered as being part of the Lukaku deal, and they've kept him. I've seen him play so well for Chelsea and I thought he was finished at the football club."
Cascarino continued: “I thought Azpilicueta was finished at the football club and he played wing-back yesterday. Chelsea are a really good side."