Willian's agent Kia Joorabchian claims that his client was persuaded to join Arsenal after being "wooed" by manager Mikel Arteta.
Despite being offered a new deal by the Blues, Willian opted to leave Stamford Bridge after they refused to grant his of a three-year contract.
Arsenal, however, did meet his demands, and what sealed the deal was a discussion with Arteta and director of football Edu.
“With Willian, there’s no secret he wanted a three-year contract, but the Mikel Arteta project was just incredible,” Joorabchian told talkSPORT.
“He was very much wooed by Mikel and Edu, and what Mikel presented to him and the way he wants to play football and the way he wants to continue and the success he wants to bring to Arsenal, made the difference.
“That’s what he said and that’s exactly what it was.”
Willian himself previously claimed that it was a promise of Champions League success which attracted him to Arteta's project.
"One of the reasons I wanted a three-year deal was to be part of a plan, not just a player passing through," he told the Sun.
“It was that he first wanted to qualify for the Champions League and win it by the time I left. That was what I wanted to hear."
Willian made his Arsenal debut this week when he featured in a 3-2 friendly defeat against Aston Villa.