Rudiger was forced off on Monday night during Chelsea's 2-2 draw with Burnley but Sarri has confirmed the Germany international will be available.
"Rudiger is okay. We are trying to recover Kante but I am not sure at the moment," said Sarri.
"The operation of Callum went in the right way. He will be back here in one or two days. He needs time now. Callum is a very strong young man, physically and mentally. I am sure he will be able to return better than before."
Sarri reports Toni Rudiger at the moment is okay for Sunday's game. They are trying to recover N'Golo Kante in time but that is not certain. The boss believes Callum Hudson-Odoi will recover well from his surgery. He estimates he will be out for three months for sure. #MUNCHE— Chelsea FC (@ChelseaFC) April 26, 2019