During the second Test between Pakistan and South Africa at Dubai International Cricket Stadium in October 2013, television cameras captured a moment that would become a defining controversy for South African cricket. Footage clearly showed Faf du Plessis, batting in South Africa's second innings, deliberately rubbing the ball against the zipper of his trouser pocket. The metal teeth of the zipper acted as an abrasive surface, scuffing one side of the ball - an action designed to create the differential surface roughness needed for reverse swing bowling.
The footage was initially spotted by television producers and replayed in slow motion during the broadcast. It showed du Plessis holding the ball in his right hand and drawing it deliberately across his trouser zip several times. The action was clearly intentional - he positioned the ball carefully against the zipper and applied pressure as he dragged it across. When the footage went viral, the match referee David Boon was compelled to investigate.
Boon, the former Australian Test batsman serving as the ICC match referee, reviewed the television evidence and found du Plessis guilty of changing the condition of the ball under Law 42.3 of the Laws of Cricket. The footage was considered unambiguous - there was no innocent explanation for why a batsman would repeatedly rub the ball against a metal zipper. Du Plessis was fined 50% of his match fee, a standard penalty for a first ball-tampering offense.
Du Plessis's reaction was measured but defensive. He maintained that he had not intentionally set out to tamper with the ball, suggesting the contact with the zipper was incidental rather than deliberate. South Africa's team management rallied around him, with coach Russell Domingo describing the fine as "appropriate" while insisting there was no malicious intent. The South African players' association expressed concern about the charge but accepted the punishment.
The incident triggered a broader debate about the prevalence of ball tampering in international cricket. Former players from multiple countries came forward to suggest that rubbing the ball on trousers - including on zippers, buttons, and seams - was far more common than most people realized. The argument was that cricket had a culture of tacit acceptance around ball maintenance that crossed the line into tampering, and that du Plessis was unlucky to be caught on camera doing something many players did routinely.
Pakistan's response was notably muted, perhaps reflecting the uncomfortable history of ball-tampering allegations that had dogged Pakistani cricket for decades. But the irony was not lost on commentators: a South African player had been caught tampering with the ball during a series in the UAE, at a time when Pakistan was playing its home matches there due to security concerns in its own country. The geopolitics of cricket and corruption intersected in uncomfortable ways.
The zipper incident would prove to be a harbinger. Three years later, du Plessis would be caught again - this time using mint-laden saliva to shine the ball during a Test against Australia at Hobart. The two convictions made him one of only a handful of international cricketers to be found guilty of ball tampering on multiple occasions, a distinction that complicated his otherwise impressive career as a batsman and later captain of South Africa.