Manchester United will have to make huge bonus payments to Ajax for new centre-back Lisandro Martinez every time the defender plays for the club.
United completed a £55million move for the Argentinian, but the completed deal means that Ajax will cash in every time Martinez plays for his new club.
Ajax will be paid an eye-watering £56,000 bonus for every appearance the 24-year-old makes for the Premier League side up to a maximum of 30 games a season, as reported by the Mirror.
Martinez has taken over the number six shirt vacated by Paul Pogba and could end up costing United over £1.