By Editor Wayne Veysey | Former Evening Standard, Press Association and Goal chief correspondent with 17 years experience of breaking big stories, including exclusives like this

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Tottenham are set to clinch the signing of Vincent Janssen within the next 48 hours, Football Insider sources understand.

Spurs chairman Daniel Levy has sanctioned a new £16.5million bid for the striker to meet the asking price of AZ Alkmaar.

A well-placed Tottenham source has told Football Insider that the north London club are confident of finalising the transfer within days.

This will be a huge boost to manager Mauricio Pochettino after the club lost out of to Chelsea in their pursuit of Michy Batshuayi, with the striker completing a £33million transfer on Sunday.

Janssen will cost half of Batshuayi but was the top scorer in the Dutch League this season with a virtual goal-a-game haul of 27 goals in 34 games. In all competitions, he struck 32 times in 49 matches.

Tottenham have seen off late interest in Janssen from Paris Saint-Germain to land the 21-year-old after tabling a series of bids in recent weeks.

A fourth offer of £16.5million will seal the transfer after Spurs’ most recent offer of £15million was rejected by AZ.

Janssen hit out on Thursday at the Dutch club as he claimed Tottenham had offered a fair price.

“I’ve made my choice clear to the club,” Janssen told Dutch publication AD on Thursday. “In my view, Tottenham Hotspur have made a big offer. There was an offer of about €18 million (£15million). “But AZ doesn’t even want to sit at the table.

“At the moment I’m still a bit disappointed with AZ. I’m disappointed with how they behaved. I would like to make the move.”

Janssen three years remaining on his contract after he joined from Almere City for £300,00 last summer.

Pochettino is keen to beef up the Spurs attack after Harry Kane led the front line virtually singlehandedly in the recently completed domestic campaign.

In other Tottenham transfer news, another White Hart Lane attacker is set to be sold this summer after a decision by Pochettino.