Captain Hashim Amla and AB de Villiers shared a record unbroken double-century stand as South Africa took control of the first Test against West Indies on the opening day at Centurion.
South Africa were rocked as West Indies took three wickets for no runs with the score on 57 but Amla and de Villiers took the bowling apart as the hosts ended on 340 for three.
After coming together with the hosts teetering at 57 for three, the pair added 283 for the fourth wicket as West Indies bowlers toiled in favourable, overcast conditions.
The stand beat the previous highest mark for the fourth wicket for South Africa in Tests of 249 set by Jacques Kallis and Gary Kirsten against West Indies in Durban in 2003.
Amla, captaining the side on home soil for the first time, will resume in the morning on 133 from 241 balls, while De Villiers was more fluent in his unbeaten 141 off 211 balls.
South Africa 1st innings 340-3 (de Villiers 144*, Roach 2-52)