Du Plessis is due to face an International Cricket Council disciplinary hearing on ball tampering charges arising from the second Test against Australia in Hobart last week, and tensions with media are simmering.
Nine Network reporter Will Crouch was aggressively pulled away from the skipper as the team arrived at Adelaide airport ahead of the third and final Test this week, footage showed.
The journalist pushed back before he was shouldered away and into the door by a man Australian media said was Proteas security chief Zunaid Wadee.
Veteran batsman Hashim Amla lashed out at the reporter.
"Disappointed.. Such provocative behaviour from reporters. Let a man walk in peace. Ask with manners n courtesy and u prob will get a response," he tweeted.
Channel Nine said Wadee also had a run-in with one of its reporters in Melbourne over the weekend as he attempted to ask Du Plessis about the tampering issue.
The Proteas skipper allegedly had a sweet, or mint, in his mouth and rubbed saliva into the ball to get more swing during the Hobart match and is facing a one-match ban.
South Africa are chasing a first-ever series whitewash in Australia when they go into Thursday's pink ball Test in Adelaide.
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