Dost, 29, required stitches after being assaulted in an unprecedented training ground attack by a group of some 50 masked men.
In the wake of the attack, Dost said he would leave the Portuguese club but has had a change of heart and signed a new three-year deal.
“I’m very pleased about it and I just want to look forward now. I signed here two years ago and really like this club. It has been a difficult time but I still have the overwhelming feeling that I belong here,” he told Dutch media on Monday.
“After the attack there were a lot of fans who supported me and for them I also want to stay.”
Sporting has undergone drastic change since the attack with the removal of the club’s president, a new coach and the departure of key players. Most of the attackers have been arrested.
(Reporting by Mark Gleeson; Editing by Ian Ransom)
