Quinton de Kock blasted an unbeaten 59 as South Africa sealed a T20I series whitewash over Sri Lanka with a 10-wicket win on Tuesday.

The Proteas, who clinched the series victory on Sunday, completed another routine win after the hosts limped to a run-a-ball 120-8, with Kagiso Rabada and Bjorn Fortuin taking two wickets apiece.

De Kock, who top-scored with 58 not out against in the previous game, was ably supported by Reeza Hendricks (56 not out) as the pair sealed victory inside 15 overs.

Sri Lanka opening batsmen Kusal Perera offered the most resistance, making 39, but when he was dismissed by Keshav Maharaj with the score at 80-5, the hosts failed to reach an imposing total once more.

Chamika Karunaratne managed an unbeaten 24 – his highest score in the format – but with De Kock and Hendricks racing to 46 without loss after the powerplay, another victory for the tourists was all but confirmed.

De Kock reached his 11th T20I fifty, and fifth for the year, off 40 balls and Hendricks followed suit, recording his sixth T20I half-century in two balls fewer as Maharaj's side triumphed with 32 balls remaining.

Miserly Maharaj

De Kock will steal the headlines with more top-order fireworks, but captain Maharaj should take credit as well as he continues to improve ahead of the spinning surfaces that await him at the T20 World Cup.

The left-armer assumed the captaincy role for his first ever T20I series and, in the final match, bowled a game-high 12 dot balls as he conceded just 14 runs from his full allocation, including the wicket of Perera.

Persistent Perera

Perera scored a third of his team's runs in the second T20I as he made 30 off 25 balls and he almost repeated the feat on Tuesday with his highest score of 2021.

However, the opener was not supported by his team-mates, with only Karunaratne and Dasun Shanaka (18) troubling the opposition bowlers, who dominated once more in Colombo.