LONDON - Andre Villas-Boas believes knowledge of Tottenham Hotspur’s key players gives Harry Redknapp an advantage in his first clash against his old club since leaving White Hart Lane.Redknapp twice finished in the top four of the Premier League during his three-and-a-half seasons at Spurs and the likes of Gareth Bale, Jermain Defoe and Aaron Lennon were key members of the team.But he will be looking to get the better of them in Saturday’s London derby at Loftus Road when his bottom of the table Queens Park Rangers team look for another win in their bid for Premier League survival."It’s a big advantage. In the end when you manage a club you know your football players very well,” said Tottenham manager Villas-Boas when asked Redknapp’s understanding of the Spurs squad."You get to know them, you get to know their qualities and I think Harry can take advantage of that.QPR stunned Chelsea with a 1-0 win over the European champions in their last Premier League game and another victory will bolster their once seemingly all but non-existent survival hopes.