"At no time did I feel pressured, at no time have I felt sad because at no point did I think there was a chance of me missing the World Cup,” he told the Guardian.
The Liverpool striker damaged a meniscus during a training session last month, and was advised by the team doctor to have the operation.
Suarez has played down the severity of the injury.
“Of course there was the normal worry there always is when you undergo an operation…and an operation is always an operation," he said.
"At first I had to rest completely. I couldn’t put weight on it at all...If they had said to me that the extent of the injury was greater, I’d have been worried. But knowing the grade of the injury, I was confident."
Uruguay's first World Cup match is against Costa Rica.
- Sports & Recreation