After nearly a decade at the club, Sergio Aguero is synonymous with Manchester City. [ MORE: Klopp runs out of superlatives as Liverpool go 13 points clear ] In 18 months’ time, the 31-year-old Argentine superstar, who now holds a handful of Man City’s all-time records, will have an important to decision to make regarding not only his own future, but also that of the club. According to manager Pep Guardiola, Aguero will be left to make that decision for himself and for the club. Aguero’s current contract is set to expire in the summer of 2021, which will mark 10 years since signing from Atletico Madrid in the summer of 2011. Given all that he has done for Man City (244 goals in 355 appearances, four Premier League titles, four EFL Cups and an FA Cup), Guardiola says it’s only right that Aguero be allowed to remain at the club, or to leave, on his own terms — quotes from Sky Sports: “I would say [replacing Aguero] will be one of the toughest things, he’s irreplaceable. We have an incredible striker in Gabriel [Jesus] and maybe will come another one when Sergio’s leaving, but he’s irreplaceable. “I think the…