Wolfsburg chief Klaus Allofs has confirmed interest in Tottenham attacker Heung-Min Son.

Spurs are willing to sell the South Korea international over the next week.

"It is right that we repeatedly talk to players that we find interesting - this includes Heung-Min Son. Whether it was his time at Bayer Leverkusen or now at Tottenham.

"We are always in contact with him," Allofs told Wolfsburg Allgemeine Zeitung.

"We need several ingredients to make a transfer work. It is difficult."