The nine most expensive buyout clauses in world football: Arsenal and Chelsea targets set to cost mega money

4. Ryan Gauld – Sporting Lisbon

Buyout fee: £48m

Gauld only made the move to the Portuguese capital last summer as a £3m arrival from Dundee United, Sporting hold such high hopes for the Scottish youngster that they’ve slapped a £48m release clause on him. ‘Baby Messi’ has only managed a handful of appearances this term, but Lisbon retain high hopes for his development.