Mateo Kovacic has dealt Chelsea another blow after testing positive for coronavirus just a DAY after returning to training following his hamstring injury.
The ex-Real Madrid midfielder had been in contention to feature against Leeds on Saturday after six weeks on the sidelines.
Chelsea have been struggling with a number of injury problems in recent weeks with Ben Chilwell, N’Golo Kante and Romelu Lukaku all missing.
Kovacic’s return was a welcomed boost for Tuchel with the Croatia international missing the last eight games.
He suffered that in the last minute of a training session back in October.
But he has now contracted coronavirus, with Tuchel describing the news as a huge setback.
Speaking ahead of the West London outfit’s Champions League clash against Zenit Saint-Petersburg, Tuchel said: “We have bad news.
“Mateo was in training yesterday and with a big smile and it was a pure pleasure to have him back.
“But he tested positive today, for coronavirus, so he’s quarantining for a few days.
“So it’s a huge setback for him personally and for all of us.”
Tuchel will, however, have to make do without Kovacic for Wednesday’s trip to Zenit.