Jay Marriott’s side had ended an eight-match losing run on Thursday with a 94-87 home victory over the North East side. They then beat them 75-67 away on Sunday.
In between their two matches against Durham, Raiders did lose 106-87 to third-placed Leicester Riders.
However, it was crucial Raiders beat Durham, who had started last week four points ahead of Marriott’s team.
Now Raiders are above them on head-to-head record, although they are still eight points off a play-off spot.
Pierre Hampton top scored on Sunday with 18. He had scored 27 against the same team on Thursday.
Raiders led 16-15 at the end of the first, 38-27 at half-time and 53-52 going into the fourth, where they pulled away.