That is according to former Arsenal and Chelsea midfielder Cesc Fabregas.
Fabregas played alongside Aaron Ramsey for three years at the Emirates before the Spaniard moved to Barcelona in 2011.
The Wales international will leave Arsenal himself this summer following the expiry of his contract.
Ramsey has agreed to join Serie A giants Juventus after failing to agree a new deal at the north London club.
But he was not able to go out with a high at Arsenal, as a hamstring injury forced him out of the Europa League final against Chelsea.
Fabregas was working at the match in Baku as a pundit for BT Sport.
And he claimed it was a huge miss for Arsenal to not have Ramsey’s services.
“The big miss of the night for me is Aaron Ramsey, definitely,” he said.
“We’re talking about [Mesut] Ozil and I love Ozil, I love Ozil.
“His quality is undeniable and I love watching him play.
“But the job Ramsey did on Jorginho in the game at the Emirates was sensational.
“The work rate, he’s the type of player you hate to play against because he comes out of nowhere.
“In the FA Cup final we came back to 1-1.
“All of a sudden from midfield he joins in, he scores the winner.
“He’s a player that you don’t want to play against and is a big miss for Arsenal.”