De Kock smashed a career-best 115 off 49 balls, while Rickelton contributed an unbeaten 77 off 36 balls, helping South Africa chase down 222 with ease, as the Proteas took only 17.3 overs to reach the target and clinch the T20I series with a game left to play.
"It's just an opportunity for me to hopefully claim that opening spot for this South African side, going into the (T20) World Cup and further on past that," he added.
As South Africa gears up to face Australia in the World Test Championship Final on June 11 at Lord's, Rickelton is brimming with confidence. The left-hander has been in impressive form, having scored a career-best 259 the last time he played in whites for the Proteas.
Chasing 316 runs, Afghanistan lost wickets at regular intervals. However, Rahmat kept fighting, trying to reduce the gap of defeat to the shortest margin possible and perhaps pull off a miracle. However, SA was too good and Afghanistan succumbed to a 107-run loss.
While many consider Test cricket to be the ultimate challenge for players, South Africa's Ryan Rickelton sees there is something more difficult in the T20 format.
Having compiled 615 runs in their first innings, the Proteas managed to claim three wickets in the final session as Marco Jansen and Kagiso Rabada continued leading the charge of the pace attack, Pakistan was left 64/3, with Babar Azam (31*) and Mohammed Rizwan (9*) unbeaten.