Pep Guardiola believes Sergio Aguero is “irreplaceable” as the Manchester City forward. © AFP Pep Guardiola believes Sergio Aguero is “irreplaceable” as the Manchester City forward enters the final 18 months of his glorious career in English football. The record-breaking Argentinian is likely to be on the bench for the reigning Premier League champions visit to Wolves on Friday as he continues his recovery from a thigh problem. That injury has sidelined the 31-year-old since the end of November and given Guardiola a taste of what life will be like when Aguero’s contract ends next year.The City manager does not expect to be able to talk Aguero into changing his plans to end his career in his homeland and that will leave Guardiola with the thankless task of replacing a man who has, to date, scored 244 times for his club.”I’d say it will be one of the toughest (tasks). Sergio is irreplaceable,” said Guardiola. ”We have an incredible other striker in Gabriel Jesus and maybe another one will come when Sergio leaves. But he is irreplaceable.”Aguero played a pivotal role when City were crowned champions of England for the first time in 44 years when his last-gasp winner against QPR…