Chelsea boss Thomas Tuchel is not sure when he will have central midfielder Matteo Kovacic available.

The Croatian is presently isolating after testing positive for COVID-19 last week.

According to Tuchel, the player is exhibiting some symptoms of the virus, and there is no set date for his return to join the rest of the squad.

"Kovacic has had some symptoms over the last few days but it is not too bad," Tuchel said.

"But I don't know when he will be allowed to come back. We need to wait to see what the doctor says.

"I know it will be the minimum of 10 days and then he has to post some negative test before he is back with us and hopefully that will happen."