Defender Niklas Stark will likely leave Hertha Berlin after seven years in summer, the Bundesliga club’s managing director for sport, Fredi Bobic, said on Friday. Bobic said that many talks were held over the past weeks with the twice-capped Stark but that an agreement to renew his contract beyond the season could not be reached. “It is going in the direction that he will make a change,” Bobic said. “He has quality, and he knows it.” Bobic also spoke of financial constraints that made it difficult for the club to make him a better offer. Stark is among the higher paid players in the squad. Bob…