Schwarzer had the entire summer off after retiring from Australia's national team.
"Itâ€™s my first time in probably 15 years when Iâ€™ve actually had the whole summer off," Schwarzer told chelseafc.com.
"Iâ€™ve been able to go away and recharge the batteries, and enjoy some time off with the family. Itâ€™s been nice to come back after a period of time off and get back in the swing of things.
"You want to play football and as much as I understand my position at the club I very much enjoy playing football as well. Thatâ€™s why we all train so hard and work so hard: to be ready to play a match when called upon."
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