Bas Dost and three other Sporting Lisbon have quit the embattled club.
Everton and Newcastle United target Bas Dost has terminated his contract with Sporting Lisbon. They all claimed "just cause" in emails sent to the commission.
Dost, Carvalho as well as Gelson Martins and Bruno Fernandes have become the latest players to seek termination of their deals at the club, following Rui Patricio's decision to cut his time at the club short earlier this month .
The turmoil comes in the wake of the club president's comments and clashes with the fans.
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Sporting CP are now in a spot of bother, with a number of first-team players seeking exits following unprecedented attacks from sections of the club's fan-base.
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 president, who reportedly used to belong to a radical fan group, denied the accusations.
De Carvalho has previously rejected calls by senior club members to stand down, accusing them of carrying out a "concerted attack on Sporting".
Football fans can get very angry and whilst the anonymous trolls on social media can be annoying and hurtful it's still a lot safer than the very real problem that Sporting players had to deal with when they were attacked by 50 fans at their training ground.
Patricio, Carvalho, Martins and Fernandes are all with Portugal in Russian Federation getting ready for their World Cup opener against Spain on Friday.