Bayer Leverkusen's South Korean midfielder Son Heung-Min is on the verge of joining Tottenham, German media reported Wednesday.

The 23-year-old, under contract with Leverkusen until 2018, is due in London to take a medical ahead of a deal worth an estimated 30 million euros ($34 million, (£22 million), German dailies Kolner Stadt-Anzeiger and Sport Bild reported.

Contacted by German news agency SID, a subsidiary of AFP, Leverkusen refused to comment on the news which broke hours before their Champions League play-off second leg against Lazio.

The transfer window closes on Monday in Germany and 24 hours later in England.

Son arrived at Leverkusen in the summer of 2013 in a club record 10 million euros move from Bundesliga rivals Hamburg.

A versatile attacker, Son figured for South Korea at last year's World Cup in Brazil. In all he has 44 caps to his name, with 11 goals.

Spurs coach Mauricio Pochettino has already signed Cameroon striker Clinton N'Jie from Lyon this close season, with the north London club's main target West Bromwich Albion striker Saido Berahino.

Source: AFP