Manchester United's sell-on clause built into Carreras' transfer to Benfica is 20% of the fee above £5m.
With Real Madrid signing him for around £40m-50m, this would mean a £8m-£10m windfall payment.
Manchester United's sell-on clause built into Carreras' transfer to Benfica is 20% of the fee above £5m.
With Real Madrid signing him for around £40m-50m, this would mean a £8m-£10m windfall payment.