South Africa defeated Sri Lanka by an innings and 45 runs shortly after lunch on the fourth day of the first Test at SuperSport Park in Centurion on Tuesday.
Sri Lanka, needing 225 runs to avoid an innings defeat, were bowled out for 180.
Kusal Perera hit a spirited 64 off 87 balls for the tourists and debutant Wanindu Hasaranga slammed 59 off 53 balls, taking advantage as South Africa seemingly tried to lift their over-rate by rushing through six overs of slow bowling after lunch.
Sri Lanka resumed at 65 for two on Tuesday but never recovered after all-rounder Wiaan Mulder dismissed overnight batsman Dinesh Chandimal and Niroshan Dickwella in quick succession.
Batsman Dhananjaya de Silva, who retired hurt after making 79 in the first innings, did not bat for Sri Lanka. He was ruled out of the rest of the tour with a torn thigh muscle.
Sri Lanka suffered a spate of injuries during the match but bowlers Kasun Rajitha and Lahiru Kumara hobbled to the crease to delay the inevitable. Both suffered groin injuries while bowling.
Sri Lanka started the match well, making 396 after winning the toss but an injury-depleted bowling attack conceded 621 runs when South Africa batted, with former captain Faf du Plessis hitting 199. Du Plessis was named man of the match.
It was South Africa’s second win in eight matches in the world Test championship. They have suffered six defeats. Sri Lanka have won one, lost three and drawn one of their five matches.
The second and final Test starts in nearby Johannesburg on Sunday.