Chelsea attacking midfielder Willian expects the 2016-17 Premier League season to be the toughest in history.
In a dismal attempt at defending their league title, Chelsea finished 10th last term and will be led by new manager Antonio Conte as they seek a return to the upper echelons in the forthcoming campaign.
"I think this season will be the most difficult in history, because there are so many managers," said the 27-year-old.
"Mourinho, Guardiola, Conte here and the others - and I think it will be difficult for everyone.
"But we have a great team and we have to show that on the pitch."
"I am really happy to sign a new contract with Chelsea," he said, before adding with a chuckle: "Now I am Chelsea forever."
Michy Batshuayi and N'Golo Kante have been the first two big-name additions under Conte and Willian is confident they can help boost the club's chances of success.
"They bring a lot of quality for sure, they come to help us and I think - if more players arrive - those will come to help as well," added the Brazil international.
