"I've been working alone for a while and now I'm training, learning and improving with the guys. I didn't know I would be back on the training pitch by now, I thought it would be a bit later," Zouma told the website (www.chelseafc.com).
"My knee is okay and I don't have any pain, which is great. I'm not fit enough yet but hopefully in six weeks or a couple of months I will be, we will have to wait and see."
Zouma, who arrived at Stamford Bridge in 2014, made 23 league appearances for the London club as the champions finished a disappointing 10th in the standings. Chelsea open their 2016-17 campaign at home to West Ham United on Aug. 15.
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(Reporting by Ian Rodricks in Bengaluru; Editing by Ken Ferris)
