The South African cricketers have ended the fourth day of the opening test against the West Indies in St Kitts on 23 without loss in their second innings, a lead of 20 over the homeside.
Morne Morkel took four for 116 as the West Indies were dismissed for 546, which gave them a 3-run lead.
Shivnarine Chanderpaul scored 166 and Brendan Nash 114.
South Africa lead the three-Test series one nil.
