Robert Kubica will definitely return to the cockpit, his manager insists.
The Pole had a fifth and final operation on Sunday to restore mobility in his elbow that was seriously injured in his February rally crash.
Renault reported that the surgeons completed "100 per cent of their task", describing the operation as "a total success".
"The function is good and now we enter the last phase; the recovery of the arm through specific training," Kubica's manager Daniele Morelli told Italian Rai television.
"I can say with certainty that Robert will be able to race again. Let's let nature take its course because the boy needs to recover his full strength. After months of surgery that's obvious and normal.
"Within a month, a month and a half, we will know when he can get back on track," added Morelli.