Chelsea can be with out key defender Levi Colwill for an prolonged interval of months after he injured his knee in coaching.
The England worldwide, 22, broken the anterior cruciate ligament of his knee on Monday and will miss many of the season.
“We all know one another from final 12 months and, you realize in our method, how vital Levi has been,” boss Enzo Maresca stated.
“I spoke with him yesterday and I instructed him that if we obtain what we achieved final 12 months, it is usually due to him – and he was a important participant for us.
“It (the harm) was within the first session on Monday, simply within the final minutes of the session.”
Chelsea have already signed cowl at left centre-back after signing Jorrel Hato from Ajax for around £37m.
