Everton won’t have striker Dominic Calvert-Lewin available for their season opener this weekend, and he is likely to miss even more time. The 25 year old started and scored in last Friday’s preseason game, a 3-0 win over Dynamo Kiev. Following that game, Calvert-Lewin suffered the knee injury while training.

Everton Manager Frank Lampard said: “We are assessing Dom’s injury. No timeframe has been confirmed and we are pretty sure what level it is so we are hopeful it is not long-term. We’ll miss him for Chelsea. He was looking in great physical condition and was training really well. It was a freak injury in training, which does happen. It’s a shame but we have to find the solutions to keep ourselves strong without Dominic before he returns.”

It’s unclear right now how severe the injury is, but the Inside Injuries algorithm is showing that this is at least a grade 2 (moderate) sprain based on the expected recovery time. Calvert-Lewin will likely be sidelined at least a month, and possible longer. This is coming off of a season plagued by injury. He missed a large chunk of the year due to a quad injury.