Tottenham manager Harry Redknapp admits James Milner, Ashley Young and Phil Jagielka are 'out of our depth' in this summer's transfer window.[LNB] Redknapp is keen to bolster his squad with three further signings ahead of the transfer deadline and has been linked with Aston Villa duo Milner and Young.[LNB]Milner is set to speak with Villa about his future after being identified as a possible target by big-spending Manchester City.[LNB]If a switch to Eastlands does not go ahead, speculation has suggested that Spurs may try to snap him up.[LNB]Milner's team-mate Young has also been connected with a move to White Hart Lane, with Villa boss Martin O'Neill admitting that he does expect interest in the winger.[LNB]Redknapp admires both Milner and Young but says he has not approached Villa about either player and has no intention of doing so.[LNB]Asked about Milner, Redknapp told Sky Sports News: "No, we wouldn't be able to. [LNB]"Anybody would like James Milner, he's an outstanding young player, but he'd be way out of our depth."[LNB]On Young, Redknapp added: "Again, I wouldn't think they'd want to sell Ashley Young. [LNB]"He is a good player but he belongs to Villa. We've not made any enquiries for him at all."[LNB]Redknapp is considering a defensive swoop with Jonathan Woodgate certain to miss the start of the season and Ledley King also struggling with his fitness.[LNB]However, he has ruled out a move for Everton's Jagielka and still believes there is a chance that King could be ready for the big kick-off.[LNB]Questioned on whether he would be targeting a new centre-back, Redknapp stated: "It's a possibility. [LNB]"I am hoping Ledley might be OK. His knee is swollen at the moment but it goes down so we will have to wait and see."[LNB]Asked specifically about Jagielka, the Spurs manager continued: "A good player again, outstanding player, but we wouldn't be in the market for someone like that."[LNB]Redknapp remains in the market for a third goalkeeper and hopes to push through a loan deal for Croatian Stipe Pletikosa.[LNB]"I think Daniel (chairman Daniel Levy) is talking to him and there is a possibility of loaning him," Redknapp revealed. [LNB]"We have two outstanding goalkeepers in (Heurelho) Gomes and Carlo Cudicini but I do feel that maybe we need three keepers with European games coming up. It is something we are interested in doing."