Foul behaviour has been condemned in a warning to Leeds United supporters from chief executive Angus Kinnear.
Writing in his Elland Road programme notes, Kinnear hoped the home crowd would play a major role in turning the tide to United’s advantage, but hoped this would not overstep the mark.
“As ever the Elland Road crowd will play a huge part and if we can recreate the cauldron of support we have enjoyed for our most important fixtures under Marcelo’s reign, I am confident it will be the deciding factor,” he said.