Briefly, it seemed like Barcelona might offer Sergio Agüero the perfect finale to his career (with maybe a year back at Independiente in his native Argentina to finish). His relationship with Pep Guardiola had never been entirely straightforward, and as opportunities for him dried up at Manchester City, a reunion with his old friend Lionel Messi seemed ideal. But financial pressures at the club meant there was no reunion, with Messi unable to return as planned, and less than half a season later, due to a heart condition, Agüero's career is over. For a player responsible for the greatest climax to a Premier League season, it is a sadly anticlimactic way to bow out.