Now with 35 caps, he scored twice on his international debut and before his goal against Les Bleus in the World Cup finals had also scored for Bafana Bafana against Spain in last year's Confederations Cup third-placed play-off.
Like Mphela, Khumalo played in all three of his country's World cup matches.
A 6ft 2in centre-back, he would be up against club captain David Weir, Algerian international Madjid Bougherra and Andy Webster for a starting place at Ibrox.
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