South Africa all-rounder Vernon Philander was fined 15 per cent of his match fee from his final Test after swearing at Jos Buttler following his first-innings dismissal.
Philander's exchange with Buttler continued a feud between the pair that saw the England wicketkeeper-batsman himself sanctioned for comments made during the second Test.
The Proteas star breached Article 2.5 of the ICC Code of Conduct, relating to "using language, actions or gestures which disparage or which could provoke an aggressive reaction from a batter upon his/her dismissal during an International Match".
On Sunday, Philander accepted a fine and a demerit point for his send-off of Buttler in England's first innings the previous day, although the latter punishment counts for little as Philander prepares to retire.
Philander bowled only nine balls in the tourists' second innings due to a hamstring injury, Joe Root leading his side to 248 all out, setting South Africa a huge target of 466 for victory.
Along with Philander and Buttler, both Kagiso Rabada - consequently suspended - and Ben Stokes have received fines and demerit points in this series, which England lead 2-1 going into the last two days of the fourth and final match.
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