A 19-man Chelsea squad made the trip to Belarus as BATE Borisov play host to Chelsea in a Group L Europa League game.
Among the big names missing from the squad is Alvaro Morata, with Olivier Giroud taking the place of the Spaniard.
Morata who’s back to form having scored three goals in his last three games has started the last three games for Chelsea, and Sarri has decided to hand him a rest ahead of Sunday’s game against Everton. Fabregas will also miss the game due to illness.
On Morata’s absence, Sarri replied: “He played for three matches in a row, so I thought it was better to rest at Cobham and have good training. ‘The only problem is Cesc [Fabregas]. He had a fever.”
Sarri asked if Morata’s impressive form meant it would be wiser to continue to select him.
He responded: “No, I think exactly the opposite
“I think it’s better for him to stay fit, with two or three training sessions, than only with matches. It’s normal for a player to play three matches and then rest for one, otherwise we could have a squad with only 13 or 14 players.
“Sometimes it’s better for the players to train rather than just play, to train on some particular physical qualities. If they only play they will lose that physical quality they need, and that’s been proved scientifically over a 21-day period.
“Today he had intense aerobic training, with five-second, 10-second, 15-second and 20-second active recovery and passive recovery. We don’t use any weights, it’s all natural work that we do in the gym. Have you ever seen a player with a weight on the pitch?”