Regis Le Bris admitted Dan Ballard’s red card for hair pulling was “hard to digest” as Sunderland’s hopes of European football next season were dented by a 1-1 draw at Wolves . Sunderland led through Nordi Mukiele against already-relegated Wolves when referee Paul Tierney dismissed Ballard, who was adjudged to have tugged the long braids of Tolu Arokodare in an aerial duel. The sending off meant Sunderland had to play with 10 men for more than an hour and Wolves capitalised, ending a goal drought stretching back to mid-March when Santiago Bueno equalised in the second half. Le Bris’ side remain 12th in the Premier League and to rub salt into the wound, Ballard faces a three-match ban that will prematurely end his season for an offence that is deemed violent conduct. But Le Bris said: “We understand the rule and I think Paul Tierney is a great referee but the execution of the rule is very hard to digest because I don’t think it is intentional and violent conduct.…