Already one of the hottest young properties in Europe, Bale elevated himself to superstar status with a stunning hat-trick to spare Spurs' blushes at the San Siro.
Manager Redknapp said: "He's an amazing young player. He plays left-back, he plays wide left, he scores goals, he can run all day. Even first half, he gave the right-back a torrid time, I felt. The right-back's one of the best right-backs in the world, possibly."
Spurs rebuffed an approach for Bale before the transfer window closed but it would be no surprise to see an avalanche of mega-money bids for the 21-year-old in January, arguably more than are likely to materialise for Wayne Rooney.
But Redknapp refused to discuss his prize asset's current value, saying: "Tottenham is a club that is looking to progress, not to sell its best players.
"If Tottenham sell Gareth Bale now, it would send out the wrong signals; it would be a club that would be a selling club.
"He's a player that we hope to build a team around. He signed a new contract at the club and, hopefully, he'll be here for a good few years to come.
"If Tottenham progress and become a Champions League team on a regular basis, he'll become a big part of the team."
He added: "You couldn't meet as nice a boy. I think he's happy where he is and he's developing as a player. A year ago, he's nowhere near that player that we see now.
"This is where he belongs and this is where he'll progress. There's no way that the club would or should contemplate ever selling him at the moment, certainly not in the near future."
Source: PA
Source: PA