Son Woong-jung, the father of Son Heung-min, has said that the Tottenham star must 'work harder' and be '10 per cent better' to become a 'world class' player.
Son was the joint winner of last season's golden boot award after scoring a brace in Tottenham's comprehensive win at Norwich City to take his goal tally to 23.
As a result, Son become the first Asian player to have claimed the award. He also became the third Spurs player to win the Golden Boot in the Premier League era.
Teddy Sheringham won the award during the 1992-1993 campaign, while Harry Kane picked up the individual accolade for a third time last season.