"Arsene at this time is facing a lot of criticism for the way the team play and they haven't got the trophies," Silva told the Daily Mail.
"But if people see the entire job he has done for the club, it has been amazing. I hope people do realise that, because when he leaves the club at some point it won't be so easy to replace him.
"I don't know if it will be this season as his contract is expiring. He loves the game, he loves what he does and he loves the club."