The 29-year-old scored 13 times and registered 12 assists for Chelsea during the 2017-18 campaign, but he was left out of the starting XI against Manchester United in the FA Cup final amid suggestions of a rift with Conte.
Willian raised further questions over his future at Chelsea when he blocked Conte out of a picture from the club's FA Cup celebrations.
"I was happy with my performance during the season, I played very well I always try to do my best and work hard," Willian told reporters.
"Sometimes to stay on the bench is difficult but I respect the decision of the manager. I don't have anything else to say about my club because now I want to have focus here on the national team and the World Cup."
Brazil will open their 2018 World Cup with a Group E match against Switzerland on June 17.