ShareSheffield United inched closer to escaping the Championship's relegation zone with a comfortable 3-0 win over rivals Sheffield Wednesday.Sheffield United cruised to a 3-0 victory over cross-city rivals Sheffield Wednesday at Hillsborough on Sunday, with Tyrese Campbell scoring twice.Campbell was on target either side of half-time for Chris Wilder's Blades, whose victory was secured by a deflected stoppage-time effort from Tom Cannon, as they pulled within one point of 21st-placed Oxford United.Wednesday remain bottom on minus-four points, 18 adrift of safety, and they could have few complaints about the result after being outclassed by their rivals.United went ahead in the 11th after Jairo Riedewald pressed high to recover possession and find Callum O'Hare. He in turn found Campbell's overlapping run, and the 25-year-old finished calmly.Ethan Horvath made a big save to deny Danny Ings one-v-one, with the Blades striker also seeing a potential second goal disallowed for a marginal offside call in the 38th minute.But Wednesday's defence was breached again early in the second half, with Campbell gliding into the area before slotting a neat finish across Horvath and into the bottom-right corner.The hosts did not attempt a single shot on target and their woes were compounded in the 91st minute, as Cannon's curler struck Liam Palmer before nestling in the far corner.Data Debrief: United maintain derby dominanceSheffield United are now unbeaten in their last seven league games against Sheffield Wednesday, winning four and drawing three, while keeping a clean sheet in each of the last six.They were thoroughly deserving of the three points here, having amassed 1.8 expected goals (xG) to Wednesday's 0.33. The hosts did not hit the target from five shots, while United did so seven times from 11 efforts.