The Tigers boss admitted his surprise that the Championship side were able to sign him last summer.
Aston Villa and Newcastle United make a tidy sum, despite their Premier League relegation.
The Juventus defender has returned to fitness in the nick of time.
Milton Keynes Dons manager Karl Robinson snubbed Leeds on Monday.
Louis van Gaal was reportedly making a move for Christian Eriksen before losing his job at Manchester United.
Warburton has brought plenty of success to Ibrox, leading Glasgow Rangers to promotion and a cup triumph.
Southampton boss Ronald Koeman is reportedly set to sign a new deal with the club.
Crystal Palace are reportedly moving for West Brom striker Saido Berahino.
Big things are expected from Klopp and Liverpool next season.
Joey Barton has left Burnley for Rangers.
Karren Brady says Tottenham won't be moving in to Upton Park without West Ham's permission.
Cedric Bakambu revealed that both Palace and the Swans were keen on a move for the striker during his Sochaux days before he went elsewhere.
West Brom striker Saido Berahino has caught in a long-running transfer saga with Tottenham over the summer.