That timescale would effectively rule him out of the remainder of PSG's season, while he would face a race to be at full match fitness for the start of Brazil's World Cup campaign in mid June.
Three-time defending champions PSG face Caen in the Coupe de France semi-finals on April 14 and, if they emerge victorious, Silva hopes his compatriot will return in time for the decider on May 8.
"I am waiting for the next week to speak with him," Silva said following Sunday's 2-1 win at Nice. "I think he is fine so far, he still needs to rest.
"Later, he could start working on his recovery. We are expecting him for the end of the season, maybe for the Coupe de France final, we will try to win this competition for him.
"Of course, he has to be ready for the World Cup. It is important for him to be back, not too early but just recover well, and don't take any risk for the World Cup and the next season.
"I think if he is recovering well, maybe he could be back to play that Coupe de France final, which is important for the club."