Tottenham Hotspur face a conundrum over Toby Alderweireld's future after the latest contract talks with the defender ended in stalemate, a source close to the situation has told ESPN FC.

Spurs have been trying to tie Alderweireld to a new deal for more than a year but are no closer to an agreement after talks broke down last month.

Alderweireld's current deal, worth £55,000-a-week, expires in 2019.

The Belgium international, 28, is aware of his value and would like a long-term contract worth closer to £150,000-per-week -- in line with the best-paid centre-backs in the Premier League -- to see him towards the end of his career at the highest level.

Spurs are reluctant to meet Alderweireld's demands, with Harry Kane currently their best-paid player on around £110,000-a-week plus significant performance-related bonuses.

The club can trigger an option to extend Alderweireld's contract by a year to 2020, but that would activate a buyout clause allowing him to leave if they receive a £25 million bid in the final two weeks of the 2019 summer window.

Alderweireld, who has been among the best defenders in the Premier League since he joined from Atletico Madrid in 2015, is aware that there would be no shortage of interest.