Manchester United, Chelsea and Real Madrid could all reignite their interest in Harry Kane next summer as the striker becomes increasingly disillusioned with Tottenham. The England captain has bagged seven goals in nine games for Spurs this season but has nonetheless seen his boyhood club make a stuttering start to the campaign. Tottenham were beaten 7-2 at home to Bayern Munich in the Champions League on Tuesday night and lay sixth in the Premier League table after seven games. Spurs entered the season with a list of unhappy players such as Christian Eriksen, Jan Vertonghen and Toby Alderweireld, all of whom have elected to run down their contracts. Even the revered Mauricio Pochettino has toyed with his future at the club, starting prior to the Champions League final loss to Liverpool last term. And now the golden boy Kane may is making Tottenham bigwigs sweat as they fear he may try to leave next summer, according to The Times. Kane has scored 122 top-flight goals in preceding five seasons and collected the 2018 World Cup golden boot but has not won any major honour. At 26, it is feared in north London that he is losing patience and his loyalty…