The 61-year-old liquor baron, who is co-owner of Sahara Force India Formula One Team, made a series of retweets of the team's practice session in Bahrain.
Known for his flamboyance, the only reference Mallya made to his arrest was to blame the Indian media with an earlier tweet.
"Usual Indian media hype. Extradition hearing in Court started today as expected," Mallya tweeted.
Apart from the Formula One action, he showed his interest in health matters, retweeting two tweets from Doctify, a health platform in the UK that offers solutions to patients who want to search, compare and book doctors online.
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Earlier in the day, Mallya - who has been declared a proclaimed offender - was arrested in London after he appeared at a central London police station.
Mallya is wanted in India for defaulting on loans. His now-defunct Kingfisher Airlines owes more than Rs 9,000 crore to many banks.
He had fled India on March 2, 2016 and has repeatedly dismissed the charges against him.
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