The 33-year-old severed ties with Arsenal last week and rejoined boyhood club Corinthians in Brazil.
Willian still had two years remaining on the three-year contract he signed at the Emirates Stadium when joining from Chelsea in the summer of 2020 but chose to terminate his contract with Mikel Arteta’s side.
The Brazil international failed to replicate his Chelsea form in North London, scoring just one goal in 37 appearances in all competitions as Arsenal finished outside the European places.
"I really thought a lot, together with my family and close people. Unfortunately, my time at Arsenal was not good, I wasn't happy at the club," Willian told TV Corinthians.
"I don't need to go into details, but I wasn't happy and I thought that returning to Brazil was the best option.
"I studied some other opportunities, but I wanted to return to Corinthians, to my home, to be close to my family. It's the club that projected me to the world, revealed me. The right time to come back was this."
Willian’s bright spell at Chelsea saw him win two Premier League titles, one League Cup, one FA Cup and the Europa League.
