Cape Town - Proteas Test skipper Faf du Plessis has been caught on camera deliberately shining the ball with mint saliva in the second Test in Hobart.
According to the cricket.com.au website, footage showed Du Plessis chewing on a mint, sticking his finger into his mouth (presumably rubbing it on the mint) before shining and rubbing the ball repeatedly.
The incident occurred during the 54th over of Australia's second innings, when the hosts were 150/5, trailing South Africa's first innings total by 91.
The very next delivery, Peter Nevill edged the ball to JP Duminy in the gully off the bowling of Kagiso Rabada as Australia crumbled to 161 all out, allowing Du Plessis' team to take an unassailable 2-0 Test series lead.
Law 42.3 of the MCC's Laws of Cricket states that a fielder may polish a ball, "provided that no artificial substance is used".
According to the SA Breaking News website, Du Plessis was warned by the on-field umpires in the first Test for deliberately bouncing the ball along the ground to rough it up.
This isn't the first time Du Plessis has been caught "doing something" with the ball.
In 2013 he was fined 50 percent of his match fee during the second Test against Pakistan for rubbing the ball on his trouser zipper. South Africa went on to win the match the next day by an innings and 92 runs.
WATCH the incident below:
Should Faf du Plessis be banned or fined for his actions? Let us know at firstname.lastname@example.org