The player's representative has ruled out a move to Benfica but says he is in negotiations with the Turkish side after the full-back impressed in a pre-season friendly
The 24-year-old moved to Old Trafford from Vitesse in 2012 and made 13 appearances for the club in his first campaign in the Premier League.
However, Patrice Evra remains the club’s first choice left-back, and Bursac has revealed there is interest in the Dutchman, although he has ruled out a move to Benfica.
"During the match against Sevilla in the past weekend, interest was expressed," he told Renascenca Radio.
"He put in a good performance. There was interest from Benfica to sign a defender, but that news is already history.
“Two days later, Benfica confirmed to me that they would keep the two left-backs [Lorenzo Melgarejo and Bruno Cortez] that they have left in the squad.
“I am currently negotiating with Besiktas, but with Benfica? No. Benfica showed interest and then gave up."