Ben Chilwell says talking about his mental health has "helped a lot" after he struggled with low confidence during the first lockdown.
Chilwell posted about his struggles on social media and said exercise helped him through a difficult period.
The England left-back, 23, moved to Chelsea from Leicester in the summer transfer window.
"I didn't talk to anyone and just kept it to myself for a few months," he told BBC Football Focus.
Chilwell, who missed the end of the 2019-20 campaign with Leicester because of a heel injury, added: "Last season I struggled with confidence and the fact that I've come out and spoken about it might help others to talk to people and tell people about their problems.