Sold for £1.1m. Signed for £117m.

Three summers ago, Manchester City let Morgan Rogers leave for Middlesbrough at £1.1m. Six months later, Aston Villa paid £8m, rising to £15m. This week, Chelsea made him the most expensive British footballer in history: £117m, six years, a club record. Middlesbrough's sell-on clause banks them another £20m. City's cut of this deal? Nothing. Three years. Two transfers. £116m of hindsight.