The South African national development team, coached by Serame Letsoaka, looked the better side for most of match and almost went ahead in the 15th minute when Mark McVeigh unleashed a powerful long-range effort, but the Mambas keeper produced a superb save to deny the FC AK midfielder.
South Africa deservedly went ahead in the 18th minute when Lefa Tsutsulupa’s right flank cross came back off the far post, with Fransch reacting quickest to slot home the rebound.
Mozambique came back strong in the latter stages of the first half, with Tico-Tico Bucuane prominent, but they were unable to break down the hosts’ defence.
The score remained 1-0 at the break.
South Africa started the second stanza in the same vein as they did the first, and extended their lead on the hour mark when Fransch latched onto a cross from the left before slotting the ball into the far corner with a superb low shot on the turn.
Tsutsulupa then went close in the 70th minute with a shot from just outside the area, but his effort flew straight at the keeper.
Mozambique then imposed themselves on the game, but as soon as they got into the final third of the field, they lacked ideas on how to break down the South African defence.
The Mambas did manage to pull one back though, when Bucuane weaved his way through the South African defence in the final minute of the game before laying the ball off to Txuma to slot home from close range.