Though SA paceman Kagiso Rabada has been on the scene for a while, his maiden Test five-fer set the Twittering tongues wagging.
South Africans, and cricket fans in general, reacted with delight when Proteas batsman Temba Bavuma recorded his century at Newlands.
England all-rounder Ben Stokes left everyone open-mouthed in Cape Town as he blasted his way to a maiden double century off 163 balls.
Namibia batsman Raymond van Schoor passed away on Friday, with the news breaking overnight, and Twitter reacted with sadness, especially the South Africa players.
Australia fast bowler Mitchell Johnson has announced his retirement from international and first class cricket, and reactions on Twitter were swift, from the likes of Sachin Tendulkar and AB de Villiers, to name a new.