Olympiacos midfielder, Willian, has admitted he made a big mistake joining Arsenal. Willian left Chelsea to sign for the Gunners as a free agent in 2020. However, speaking with Five YouTube channel, the Brazilian revealed that he endured the most difficult time of his career at the Emirates. “I wasn’t happy, I wasn’t happy. That’s why I didn’t perform. I don’t want to go into the details,” Willian said. “When I arrived there I was happy, from the beginning I was motivated, I wanted to do well – new club, new mates, new project. But after three months, I said to my agent: ‘Please, I want to go’…