The 26-year-old World Cup-winner's future has overshadowed United's pre-season tour since they arrived in Perth on Monday, with Real Madrid and Juventus rumoured as possible destinations.
Small played 47 Tests for the Springboks between 1992 and 1997 and was part of the team that won the 1995 Rugby World Cup on home soil.
The 37-year-old Williams looked far from convincing as Alison Riske pushed her the whole way over an engrossing two-hour duel.
Alun Wyn Jones’s current deal was due to end after this year’s Rugby World Cup in Japan.
Cornal Hendricks, who made a return to rugby in the Super Rugby tournament, would again play in the country's premier domestic competition for the first time since 2015.
The 30-year-old, who played for Watford before moving to China two years ago, has scored three goals at the African football showpiece in Egypt.
It was originally planned to use VAR from the semi-final stage but it will now be brought in from the last eight games.
Newly appointed Currie Cup head coach Sean Everitt also named several youngsters on the bench.
South Africa beat hosts Egypt last week and face Nigeria in the quarterfinals on Wednesday.
New Zealand’s Kane Williamson won the toss under clouds and batted first because that is what conventional wisdom dictated.
