However, Mane has been on loan at German club Stuttgart since the simmer of 2016, so he might not have the legal grounds to quit the club, so any transfer for him might involve a fee.
William Carvalho, Gelson Martins, Bruno Fernandes have all made a decision to break their club contracts with Sporting Lisbon following a season of off-the-field trouble between players, fans and the owner.
Six players, some key to the first team, have rescinded their contracts with the Lisbon based club.
They are Gelson Martins, Bruno Fernandes, William Carvalho, Daniel Podence and goalkeeper Rui Patricio, in addition to the aforementioned Bas Dost.
The news follows a malicious attack on Sporting's players and staff at the Academy of Alcochete last month, where around 50 hooded supporters, armed with belts and stick, attacked the players at the end of a training session. At least one player was injured and the club's changing room was trashed.
In April, outspoken president Bruno De Carvalho harshly criticized his team's performance against Atletico Madrid in the Europa League, and pointed out mistakes by individual players on social media.
The Lisbon club are now in turmoil as the result of a rift between the squad and both the club's president Bruno de Carvalho and a radical group of supporters.
The players responded by posting a joint statement defending their commitment to the club and questioning the manners of De Carvalho, saying he should support them as their "leader".
Ex-Liverpool centre-back Sebastian Coates and his partner Jeremy Mathieu came in for the strongest criticism, with De Carvalho claiming "it was [as] if we had nine players".
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