Newcastle United just pulled off the kind of trade that would make a Wall Street arbitrageur blush. The club sold midfielder Sandro Tonali to Tottenham Hotspur for a fee that could reach £100 million with add-ons, then turned around and signed 18-year-old Dutch midfielder Sean Steur from Ajax for £23 million.
That’s a net gain of roughly £77 million on a single roster swap. In financial terms, Newcastle bought an asset for £55 million in 2023, held it for three years, and flipped it for nearly double.
The deal breakdown
Tonali’s departure to Spurs, completed on July 6, 2026, represents a club-record transfer for Newcastle on the selling side. The Italian midfielder originally arrived from AC Milan for £55 million during the summer of 2023, meaning the Magpies walked away with a tidy profit on a player they actually got significant use out of.
His replacement, Steur, is a versatile midfielder capable of playing in both the 6 and 8 positions. At 18, he fits squarely into Newcastle’s stated strategy of reinvesting transfer proceeds into younger players with high ceilings rather than chasing established stars at premium prices.
