The centre-half was sidelined for just under eight months after sustaining an anterior cruciate ligament injury against Manchester United in February.
Prior to the 22-year-old’s knee problem, he had been regularly starting in defence for Chelsea, but he now faces the task of winning back his place.
Gary Cahill, David Luiz and Cesar Azpilicueta have formed a formidable trio under Antonio Conte this term, but Zouma is next in line in the pecking order.
Kurt Zouma has featured for the Chelsea first team three times this season
Kurt Zouma has had to wait for his chance with David Luiz among those shining for Chelsea in defence
If you give up and you’re sad every day you’re going to struggle
The France international has made just two starts since returning to the first-team, both in the FA Cup, along with a brief cameo off the bench in Saturday's 3-1 win over Arsenal.
But he is happy to just be back fit at Chelsea, even though his battle against injury was a challenge.
“If you are mentally good, your recovery is going to be better and quicker,” Zouma told the Mirror. “That’s my philosophy.
“If you give up and you’re sad every day you’re going to struggle. I keep laughing. I’m still young, enjoy the life. I’m a footballer, I have a great life. So let’s laugh.”
Kurt Zouma suffers horror knee injury during Man United clash
Sun, February 7, 2016
Chelsea ace Kurt Zouma suffered a horror knee injury during the Blues' Manchester United clash at Stamford Bridge
1 of 9
Kurt Zouma suffered a horror knee injury during Chelsea's match against Manchester United
Kurt Zouma is above club captain John Terry in the pecking order at Chelsea
Zouma’s damage came after he landed awkwardly as his knee buckle backwards.
However, despite being a more gruesome-looking injury, the defender was not terrified to relive it back.
He added: “Not me. I’m not scared to watch. I don’t care. It’s very difficult when someone tells you that you’re going to be out for nine or 10 months.
“When I saw the images I knew it was going to be long. But in my mind I said, ‘OK, this is the injury, you’re 22, so do a good rehab, recover well and when you come back you will have plenty of time to play many games.’”