South Korean forward Son Heung-Min has rejected the offer of a new contract at Hamburger SV.
With his current deal due to expire next year, the German club are keen on tying the 20-year-old to a new deal as Tottenham Hotspur, Chelsea and Manchester United circle.
Despite interest from the Premier League, talkSPORT report that Bayer Leverkusen are the frontrunners to secure his signature.
Hamburg plucked Son from Dongbuk High School, Seoul as a 16-year-old in 2008 and gave him his professional debut two years later.
He scored 12 goals in 31 starts in the Bundesliga this season.
