Tottenham's Korean sensation Son Heung-min has sent an ominous warning to Spurs' Premier League opponents – he believes he can get even better.

The 23-year-old has been impressive since joining the North London club from Bayer Leverkusen for £22million this summer.

Heung-min found the back of the net twice in Tottenham's 3-1 Europa League win over FK Qarabag on Thursday and also scored the winner in Spurs' 1-0 Premier League victory over Crystal Palace on Sunday.

Despite his scintillating vein of form, Son has vowed to get even better ahead of this weekend's North London Derby clash with bitter rivals Arsenal.

"I haven't adapted to the Premier League yet," Son told Sky Sports.

"I want to do much better and prepare as well as I can.

"I understand what the club invested in me. I'm getting a lot of help from my team-mates and coaches, and that's why I want to do even better.

"I heard about the North London derby when I was in the Bundesliga. I want to prepare well and do well on Wednesday."