Here, the PA news agency looks at the Chilean's career in England of mostly highs at Arsenal and lows at United.
Arsenal – The Highs
Whilst Sanchez delivered from numerous positions across the front line at Arsenal, particularly from the left or as a central striker, he failed to fit in at United. It was thought he would give them numerous options as a centre forward, number 10 or winger but, bereft of confidence, he failed to find a specialist role. Fans eventually got on his back and the problems worsened.