Karunaratne, one of five left-handers in the Sri Lankan top six, made 91 not out off 116 balls with 17 fours.

But there was only one partnership of note, 85 for the second wicket with Lahiru Thirimanne, who scored 31. They came together after Kusal Perera had been bowled with only one run scored.

Fast bowler Lungi Ngidi took the first three wickets to finish the day with three for 26, having Thirimanne and Kusal Mendis caught down the leg side by wicketkeeper Quinton de Kock off successive deliveries. It was the third successive nought by Mendis.

BRIEF SCORES: Sri Lanka 157 & 150/4 in 39 overs (D Karunaratne 91 batting, L Ngidi 3/26) vs South Africa 302 in 75.4 overs