The French centre-back has missed three matches with a hamstring problem but has taken a full part in training during the Toffees' break in Tenerife this week.
"Sylvain has come through four sessions now and has had no reaction," said Everton manager Roberto Martinez.
"That straightaway has been one of the benefits. He has been able to work with the group with no effects to him."
The Everton squad return to England on Thursday evening after their short spell in the Canary Islands which Martinez believes has been very beneficial.
"It has been terrific so far. It has been a unique opportunity to spend a lot of time together and to work on the training pitch," added the Spaniard.
"The facilities and the hospitality have made a perfect environment for our warm weather training.
"The players have benefited because of the humidity and the weather. We have been working hard and getting the benefits from it.
"The boys who are carrying a little bit of an injury or a problem have been able to work extra time and it's been very beneficial for the whole team."
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