Pierre-Emerick Aubameyang has labelled Borussia Dortmund CEO Hans-Joachim Watzke a "clown' in response to his dig at the Arsenal star earlier this week.
Aubameyang spent five years at Westfalenstadion before securing a £60 million ($74m) switch to Emirates Stadium in 2018.
The 30-year-old has since emerged as one of the most prolific strikers in the Premier League, netting 39 goals in 56 appearances.
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In a recent interview with Suddeutsche Zeitung, Dortmund chief Watzke aimed a dig at Aubameyang, insisting his decision to join Arsenal was purely based on financial gain.