Tottenham Hotspur are now preparing to step up their contract talks with Heung-min Son to extend his stay in north London. The South Korean forward found the back of the net for the 13th time in the Premier League this season. Despite Heung-min Son showing no sign of slowing down at the age of 31, his contract is now set to expire next summer. Heung-min Son contract updateAccording to transfer guru Graeme Bailey for HITC Football, the Lilywhites are now planning to up their efforts to secure Son’s future. Discussions are already believed to have taken place over extending the 31-year-old’s con…