Women's Rugby World Cup 2010
Venue: Surrey Sports Park, Guildford (group stages) and Twickenham Stoop (semis and final) Dates: Fri 20 August - Sun 5 September
Coverage: Watch main matches live on Sky Sports, Highlights of knockout stages on BBC Sport (UK users only)
Zandile Nojoko's try put South Africa out of Wales' reach
Wales Women's hopes of reaching the semi-final were all-but ended after being beaten by South Africa in Pool A.
Non Evans sparked a late rally with a penalty followed by a conversion for Elen Evans' try, but the damage was already done.
South Africa struck twice in the first half, Namhla Siyolo running through on the half-hour with Charmaine Kayser adding the second try 10 minutes later.
Zandile Nojoko made it 15-0 after the break, leaving Wales too much to do.
It leaves Wales bottom of Pool A with one game to go against New Zealand on Saturday.
The holders crushed Australia 32-5 in Tuesday's other game in Pool A, leaving them almost certain to advance as group winners.