Sheffield United manager Chris Wilder was sent off after he booted a ball in frustration at his own fans.The incident occurred right on half time during the Blades’ clash against Southampton as Wilder was about to head down the tunnel at Bramall Lane.View Tweet: https://t.co/G62QKmlSjOAs he made his way off the field, Wilder took his anger out on a ball that was sent flying into the stands.Wilder’s frustrations may have stemmed from what was deemed a controversial penalty decision in favour of Southampton as Ross Stewart was fouled in the box.Recognising the friendly fire, Wilder immediately went into the stands to get the ball back and apologise to the supporters he gave an almighty scareBut referee Adam Hergzec didn’t see the funny side of it.Upon Wilder returning back to the field, the official brandished a red card for the Blades boss.Things got even worse for Sheffield United early in the second half when Ross Stewart equalised for Saints.More to follow…