When Raphael Varane signed for Manchester United, rival fans said it was because he'd already peaked and was injury prone.
When Casemiro signed for Manchester United, rival supporters suggested he only joined for large wages in his declining years.
Both of those players, who were sold by Real Madrid for a combined fee of around £100million over the last two summers, have been world-class this season and those accusations from fans of Liverpool and Man City have looked increasingly stupid.