By Tom Gott Sergio Aguero has confirmed that he has been medically cleared to start training ahead of a one-time-only appearance in a friendly in Ecuador. Manchester City’s all-time leading scorer, Aguero was forced to retire in December 2021 just a few months after joining Barcelona when he was diagnosed with a heart condition, bringing an abrupt end to a legendary career. Since then, Aguero has been active online and was involved in Argentina’s behind-the-scenes team at the World Cup, and he has now confirmed that he will be back on the pitch in the near future in the colours of Ecuadorian s…