The Lisbon club claims that the Nerazzurri improperly dodged a hefty transfer clause in the original deal that took the player to Milan
Inter have categorically dismissed claims from Sporting CP that they acted in an improper manner by terminating Joao Mario's contract, as the Portuguese side prepare legal action over his move to rivals Benfica.
Sporting contend that the player was released in order to circumvent a hefty transfer clause that would have come into effect had Inter sold him to Benfica.
But the Nerazzurri, who signed Mario in 2016 from Sporting, countered with a strongly worded statement in which they assured that the accusations were "unacceptable".