Manchester City manager Pep Guardiola said he will face a difficult challenge in replacing Sergio Aguero if the Argentine striker decides to leave the club at the end of his contract in 2021.
Since joining City in 2011, the 31-year-old Aguero has become the club's record scorer with 244 goals in all competitions. He has already found the net 13 times this season despite battling injuries.
"Sergio is irreplaceable," Guardiola told the British media. "It'll be one of the toughest asks to replace him. We have another incredible striker in Gabriel Jesus and maybe another one will come when Sergio leaves but he's irreplaceable."
Aguero is back in contention to start Friday's Premier League match against eighth-placed Wolverhampton Wanderers, having fully recovered from a thigh injury.
Guardiola's side is looking to leapfrog Leicester City into second place behind Liverpool with a third straight league win.