Usuthu fell behind early to Deolin Mekoa’s goal at the Moses Mabhida Stadium, but just after Kwanda Mngonyama was sent off for Maritzburg, AmaZulu grabbed a second half equaliser through Thapelo Nyongo.
With Chippa United losing at home to Kaizer Chiefs, a winner would have guaranteed Usuthu’s survival, but Bongani Ndulula wasted a gilt-edged opportunity, and AmaZulu’s fate was sealed when Abel Mabaso’s deflected shot gave United the win.