Son Heung-Min
Tottenham are close to completing their fifth summer signing after Son Heung-Min (R) underwent a medical on 26 AugustGetty

Bayer Leverkusen striker Son Heung-Min has undergone a medical with Tottenham Hotspur on Wednesday, 26 August, according to the German club's director Rudi Voller. But the two clubs are yet to reach an agreement for the transfer of the player to White Hart Lane.

Mauricio Pochettino has confirmed that Spurs will sign a striker before the end of the transfer window, and have been on the trail of West Bromwich Albion's Saido Berahino. The White Hart Lane outfit have had two bids knocked back by the Baggies for the striker, which has now prompted them to look elsewhere for a solution to bolster their attack. Apart from the two bids, the Midlands club also rejected a transfer request from the player, who is keen on a move to the London-based club.

The England U21 international was Pochettino's main priority despite stating that they had multiple targets, but the hefty price tag and their rivals' reluctance to sell, have pushed the north London club to make a move for the South Korean international. Son, who joined Leverkusen for a club-record fee from Hamburg SV, has been impressive in the Bundesliga last season; his 14 goals in all competitions helped the club reach the knockout phases of the champions League and finish fourth, which guarantees them a place in this year's competition as well.

Voller has made it clear that a medical does not indicate that the transfer is a done deal, and has insisted that it will be done on Leverkusen's terms. Son, however, is not primarily a striker, as he has featured mostly in the wide positions for the Bundesliga club in the last two seasons.

"There is a request and there are talks. But nothing is done. Son would not have played today anyway, he was sick at the weekend already. At this moment he is our player," Voller told Sky, according to the London Evening Standard.

"I saw many medicals in this business where there was no deal afterwards. We will try to reach an agreement, but only under our conditions," the former Germany coach added.