Chelsea goalkeeper Petr Cech believes they could be challenging for a "quadruple" next season.
"If we avoid injuries, it is realistic," said Cech in Czech newspaper Sport. "We had injuries last season and it was always in the same places.
"It is difficult to win four trophies, but if we managed this, it would be an extraordinary achievement."
He added: "I believe our signings will quickly gel in and will be our advantage."