Complex sentence: There was concern over Lindstram's future at Doncaster Rovers after he sustained an ankle injury during a match against Portsmouth, which ended a 1--1 draw, but in the end Lundstram's loan spell was extended until the end of the season.
Split into simpler sentences: There was concern over Lindstram's future at Doncaster Rovers after he sustained an ankle injury during a match against Portsmouth, which ended a 1-1 draw. But in the end, Lundstram loan spell was extended until the end of the season.