Switzerland's Stanislas Wawrinka has taken a wildcard into his home tournament next week inGeneva, which will be just his second clay-court event of the season.
The defending French Open finalist is still coming back from double knee surgery in 2017, and fell in the first round of Rome this week.
The other wild cards in Geneva are Fabio Fognini and David Ferrer.
The event has also seen two top names withdraw as both David Goffin and Denis Shapovalov will not be playing following their deep runs in Rome.