Black Star defender Musa Nuhu has been ruled out of football action for a month, medical results indicates.

The former WAFA SC center-back underwent a successful surgery on the knee injury he picked up during Black Stars pre-AFCON training in Dubai.

But the result from the Berit Clinic in Switzerland on Tuesday indicates  the 22-year old will be missing in action for several months.

His club FC St. Gallen wrote on twitter ''Musah Nuhu has a torn ACL in the left knee.

"He has been successfully operated today in the Berit Clinic in Speicher. We wish Musah the best possible and speedy recovery!"

He earned his debut call-up to the Black Stars by Coach Kwesi Appiah ahead of the 2019 Africa Cup of Nations but failed to make the final list to the tournament due to injury.

Musah signed a permanent deal with FC St. Gallen after a successful loan stint where he scored one goal in 13 matches.