The 27-year-old has completed his road to recovery after participating in PSG's 2-0 win over Sochaux at the weekend, which saw him substituted in the 62nd minute.
"I was not 100 per cent yet, but I'm glad I could play this game," explained Sissoko, speaking to the club's official website.
"Personally, making my comeback is a win and it's good for my morale. The lay-off was very difficult but I always kept the faith. My family was very supportive.
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Sissoko admitted that good preparation is key for their next fixture, as they face Porto in the Champions League on Wednesday, and he also made it clear that they were taking their season one game at a time.
"We will prepare well for this match as it will be decisive. Porto are a big team, which usually do well in European cups. You must go there with a lot of determination and seriousness.
"Marseille lost 4-1 this weekend against a good Valenciennes side, but we know it will not be the same game.
"We know that we will be waiting, but we take the matches one after the other. So we think of the match against Porto and then Marseille after," he said.