A page including a photo of the Croatian international and a lengthy profile of the player, including a description of his on-pitch highlights as well as various stats about his career.
It seems that the club's web editors jumped the gun, however: no such deal has yet been finalised, and for the moment the player remains on the books at Tottenham.
Real Madrid staff quickly realised the blunder and took the page down - but not before thousands of people around the world had hammered 'PrtScrn' frantically to record the cock-up for postertity.
Luckily, our colleagues over at es.eurosport.yahoo.com were among those who grabbed a screenshot, which you can see on this page.
How long will it be before the page can be reactivated by Real Madrid's webmasters? Well, the latest reports suggest that Spurs will not agree to a £30 million transfer until they are confident they have lined up an adequate replacement. As ever, you can follow the latest with Eurobot's live transfer ticker.