By FOX Sports Staff
QPR manager Redknapp was the man put in charge of grooming Bale when he signed at Totenham in 2008. Under the Englishman, Bale transformed from just a fringe presence to the world's most expensive football player.
But the ex-Totenham boss is still concerned with Bale's development and feels that the Welshman is far from the finished article.
He believes Bale's success in Spain would soley depend on his ability to stand up to the superstars plying their trade at the Santiago Bernabeu.
Writing in his serialised autobiography in the Daily Mail, he strongly holds the view that Bale can live up to his world record €100 million fee.
"His biggest test will be to step out of the shadow of Cristiano Ronaldo with confidence. That won’t be easy," the 66-year old said.
"Ronaldo is a huge star at Madrid and will probably want to take nine out of 10 free-kicks - at least. Gareth will have to assert himself and that will require a strong mind.
"He has to think ‘I’m an £86million player’ and act like it, taking responsibility, claiming the ball when he fancies his chances.
"And yet at the same time he cannot dwell on his fee and what it means too much because that would put him under immense pressure. It is a tricky balancing act."
Ronaldo recently celebrated 100 appearances in European competitions with Madrid and has taken his overall goal tally to a staggering 212 from 208 games for the La Liga side. Naturally, Ronaldo would want his teammates to live up to his high standards and he often expresses his displeasure on the field.
"He (Bale) will have to be ready for the matches when he goes it alone, has a shot, misses and Ronaldo starts throwing his arms up in the air.
"The one thing the club cannot provide for Gareth and Cristiano is a ball each — so they will need to work hard on that partnership because they are such similar players."
Ronaldo has scored 12 goals in ten matches for Los Blancos and has been a mainstay under new coach Carlo Ancelotti.