Sangweni sustained the blow in Bucs' 3-1 win over Mpumalanga Black Aces in a Telkom Knockout last-16 tie at Mbombela Stadium on Tuesday night.
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"We will learn only in the afternoon, how successful the operation went, and how long his recovery period will be," read a communiqué on the club's official website.
Meanwhile, central midfielder Thandani Ntshumayelo, who was also forced off the field against Aces, will see a specialist today after suffering a relapse of a foot (metatarsal) injury.