Five players that clubs regret selling this summer: Arsenal and Chelsea deals included

Frank Lampard (Chelsea to Released)

In fairness to Chelsea, they weren’t to know that Frank Lampard would end up at key title rivals Manchester City, via a convoluted route, once they released him in the summer – but the club’s all-time leading goalscorer has already come back to haunt them and could yet play a decisive role in the Premier League title race.