"I sent her a text, she was really surprised and very disappointed," he said, adding that his client was currently in Washington.
While Lagarde was finance minister, Tapie won French government compensation after selling his stake in sports company Adidas to Credit Lyonnais in 1993. He claimed the now defunct bank had defrauded him after it later resold his stake for a much higher sum.
The IMF's executive board reaffirmed its confidence in Lagarde's ability to effectively carry out her duties, IMF Communications Director Gerry Rice said in a statement.
France's current finance minister, Michel Sapin, concurred, saying in New York she was innocent until proven guilty and should not be prevented from carrying out her IMF duties.
Earlier this month, a French court dismissed Tapie's demand for a further payout of over a billion euros, ordering him instead to pay back the original compensation.
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