The defender's future in the game is in doubt after it emerged earlier this month that he must go under the knife again, just a year after having a tumour removed from his liver.
Ibrahimovic had reportedly given Blaugrana midfielder Seydou Keita a signed shirt to pass on to Abidal after Wednesday's Champions League clash between Milan and Barca and the Swede, who spent a season at Camp Nou, has now publicly voiced his support for his old colleague.
"I hope that Abidal's operation will go perfectly well and I hope that he gets everything he needs in order to be healthy," the Rossoneri forward told reporters on Friday.
Ibrahimovic and Abidal are said to have enjoyed a close friendship during the Swede's one-year stay in Catalunya between 2009 and 2010.
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