By London correspondent Tony Hughes

Clinton N’Jie and Nacer Chadli could be forced to stay at Tottenham as their attempt to Georges-Kévin Nkoudou is on the brink of collapse, according to a report.

Nkoudou had appeared set to complete his protracted transfer to White Hart Lane this week after the Cameroon forward Njie received a work permit to move the other way to France on a season-long loan.

But the Guardian claim the plug could be pulled on the swap deal because Marseille are unhappy with the new structure of the payments being proposed by Tottenham chairman Daniel Levy after he previously agreed to pay the majority of the fee up front.

Levy attempted to renegotiate the offer for Nkoudou, who completed his medical almost three weeks ago and has been in London ever since. A

The Guardian report that a new offer comprising an initial £4.2million that could eventually reach £11million is said to have fallen way short of Marseille’s valuation.

Spurs are now understood to be ready to walk away from the deal, even though Mauricio Pochettino and his staff regard N’Koudou a potential star of the future.

This could mean that wingers N’Jie and Chadli, who has been told by Pochettino he is free to find a new club, end up staying at White Hart Lane.

N’Jie, who has struggled to break into the Spur side after suffering injuries and mixed form since joining from Lyon last summer, was pictured in training at Tottenham’s Enfield headquarters on Tuesday.

N’Koudou, 21, joined Marseille from Nantes during last summer and the winger proved to be one of the signings of the Ligue 1 campaign, scoring 10 goals and providing 5 assists in 41 matches in all competitions.

N’Koudou’s exploits were all the more impressive due to the fact that he was playing for a struggling Marseille side.

Mauricio Pochettino has added another forward to his side this summer in the shape of  Holland international Vincent Janssen, and N’Jie had found himself further down the pecking order at the club.

In other Tottenham transfer news, Pochettino will listen to offers for seven senior players in the final weeks of the summer window.