Hearts edged four points clear at the top of the Scottish Premiership after a 1-1 draw at Motherwell but lost key duo Craig Halkett and Marc Leonard to season-ending injuries and were furious to be denied a second-half penalty. It means Celtic will have the chance to reduce the deficit to just one point if they defeat Rangers in Sunday’s Old Firm, while Derek McInnes’s side could still win a first league title since 1960 at Tynecastle against Falkirk on Wednesday depending on how Celtic fare. Hearts fell behind for the fifth consecutive game when Stephen Kingsley bundled an attempted clearance into his own net, but Lawrence Shankland equalised before the break. (PA) The big talking point came in the 66th minute when substitute Alexandros Kyziridis went short to receive a corner and went down under the outstretched leg of Motherwell’s Tawanda Maswanhise in the box. Referee Steven McLean was sent to the pitch-side monitor by VAR but stuck with his original decision.…