Birmingham City suffered a heavy defeat on the road as Sheffield Wednesday exacted revenge over their hosts at Hillsborough.
A Caolan Lavery brace, Leon Best strike and Will Packwood own goal sealed a miserable afternoon for Lee Clark's side, who could only muster an 80th minute Lee Novak consolation.
Lavery handed the hosts the lead in the 16th minute by skipping past Tyler Blackett to cut in from the right and tuck away his hopeful effort into the bottom of the net at the far corner.
It went from bad to worse for Blues five minutes later as Chris Maguire's corner from the right was flicked on by Lavery and dropped for Best to tap in from a yard out.
With right-back Paul Caddis introduced for Blackett in the 23rd minute, resulting in a tactical switch that saw Jonathan Spector move across to left-back, Blues feared they would be forced into a second substitution in the 37th minute. Paul Robinson appeared to be knocked unconscious following a clash of heads with Lavery but after four minutes of treatment the skipper was given the all clear to continue.
Blues looked to fall 3-0 behind on the stroke of half-time when Atdhe Nuhiu spun into space in the six yard box and sent the ball into the net, only for the match officials to chalk off the goal for a foul on Packwood.
Obviously still suffering the effects of that earlier collision, Robinson didn't emerge for the second-half with Aaron Martin entering the fray in place of the captain.
And it was Martin's central defensive partner Packwood who found himself on the receiving end of a unfortunate own goal for the Owls' third. Jeremy Helan's charge down the left was followed by a low cross that struck Packwood's leg 10 yards out and looped up over the sprawling Darren Randolph.
Wednesday weren't done as Lavery tucked away his second of the match with a well-taken effort from 25 yards that gave the outstretched Randolph no chance and found the left corner.
To rub salt in the wound further, Blues were reduced to ten men in the 78th minute as Emyr Huws limped off with a hip injury with all three of the visitors' allocated subs already used up.
There was reason for the 1,500+ travelling Bluenoses to cheer in the 80th minute as good work down the right from second-half sub Federico Macheda allowed Novak to slide in and convert at the far post.
However that was the only positive from an utterly forgettable afternoon for Blues who will now dust themselves down ahead of the visit of Reading.