The agent of Jakub Kiwior admits Arsenal were the keenest in the battle to sign the former Spezia defender.
The Polish defender joined in an £18million deal.
But his agent, Sasha Baranov, has revealed Napoli, AC Milan and Juventus were also interested in his services.
However, Baranov told TV Play: "When a side like Arsenal come along, it becomes difficult for a 22-year-old to say no.
"If it was Juventus or another big club coming in, it may well have been the same situation, but Arsenal are the only side who really pushed the talks forward.
"We honestly didn't expect it to all move so fast, we thought he would stay in January and leave Spezia in June.
"Arsenal came in and the player did not put pressure on his club, he just said that if the move was to happen, then good, otherwise he was happy to wait."