Zenit Saint Petersburg and former Tottenham Hotspur manager Andre Villas-Boas could raid his old club for Younes Kaboul, [football] direct news understands.The defender has had a difficult time with injury over the last year or so, which has limited his first-team opportunities. Although regarded as a key player for Tottenham, it is now believed that he could leave the club in the summer if the right offer came along.AC Milan have also been linked with the 28-year-old, who has actually had two spells at White Hart Lane, with two years at Portsmouth in between.However, with Spurs now planning new signings for next season in order to improve their fortunes after a difficult campaign, Kaboul could be a player who is allowed to make way for some fresh blood, though his old boss Villas-Boas remains a fan of his.The Portuguese coach left north London in December after a string of poor results, and was recently appointed as the new manager of Zenit, after the Russian giants parted company with Luciano Spalletti.The 36-year-old has already been linked with a raid on his old club for Brazilian midfielder Paulinho, as well as for a former player of his from Porto, Joao Moutinho, currently at Ligue 1 giants Monaco.Villas-Boas is prepared to make many changes to his team this summer, a European football insider explained. “He wants Kaboul for his defence, and, as you say, Paulinho and Moutinho are targets for midfield.”Watch Manchester United v Manchester City Tuesday night. 24 hour Sky Sports Day pass for only 9.99. No contract.