Ole Gunnar Solskjaer was proud of sharpshooter Anthony Martial’s match-winning display as the forward’s maiden Manchester United hat-trick sealed a comfortable win against European hopefuls Sheffield United.The 24-year-old endured a topsy-turvy time at Old Trafford following a fine debut campaign under Louis Van Gaal, with Jose Mourinho keen to sell an inconsistent forward who at times infuriated his manager.