LONDON (Reuters) – The Premier League took a weekend off but the FA Cup fourth-round served up plenty of shocks while Manchester United continued their resurgence under Old Gunnar Solskjaer. Here are five talking points from the weekend. SOLSKJAER BUILDS HIS CASE When Old Gunnar Solskjaer was made interim manager at Manchester United in the wake of Jose Mourinho’s sacking, few seriously saw the club’s former Norwegian striker as a serious candidate be given the job on a long-term basis. However, after Friday’s exhilarating 3-1 defeat of Arsenal in the FA Cup extended United’s winning run since Solskjaer took over to eight matches in all competitions, that must now be a serious consideration. It is not just the string of wins that is so impressive, it is the joie de vivre that has swept the squad since Solskjaer rekindled the attacking flair the club prides itself on. Some questioned whether he would have the authority to deal with the club’s big egos. Instead, Paul Pogba has started to live up to his reputation as a marauding midfielder and on Friday even Romelu Lukaku and Alexis Sanchez, who have struggled for form, looked world class. If the run continues, the clamour…