The former Arsenal captain's season is over after undergoing hamstring surgery.
Enrique said: "In football injuries are normal and players have to go through these processes. That has been the case with Thomas since he arrived at the club.
"The team is playing well and we have to support the player. With the speed at which time passes, he'll be with us soon. There's no intention of reinforcements in principle, but what plans the club have is another thing. We have no doubts that Vermaelen will be a good signing for us."
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