Sarri says the empty stadium can impact the quality on the pitch.
He said, “It's certainly not a beautiful feeling, but the strength of a team lies in knowing how to get away from the environmental conditions.
“Even the rhythm might change. The absence of the fans can change things, even if the slow rhythm is more an impression you get on TV, due to the silence.
The tactician is concerned about the health of his players and fears injuries.
“I believe it's a very high risk, since there has been a muscle decline for everyone.
“We have opted for a system of increasing the workloads, but lower than what we usually do in the summer.
“The other unknown factor will be next season, given that we can't make any big preparatory calls."