The Spaniard bagged his 12th goal of the season as Antonio Conte’s side narrowly beat West Brom 1-0 on Sunday afternoon.
Speaking to BT Sport, Redknapp said: “What he’s done this year, he is concentrating on playing football. He’s still aggressive you can’t take that out of his game.
“Last year he was more interested in having fights with people than playing football. Every time I saw him he was going out and it was all off-the-ball stuff.
“Really just aggravating – it got on my nerves just watching him play.
“This year he has been fantastic.”