Eight from eight from Ole Gunnar Solskjaer and his legend grows. He is at the wheel for Manchester United and has steered them into the Fifth Round of the FA Cup as they overcame Arsenal in a full-throttle tie. How good does that feel for their fans? The caretaker manager maintained his perfect record, with remarkably an eighth successive win after succeeding Jose Mourinho, and took another big scalp, with the bonus of one of the goals being scored by Alexis Sanchez on his return to the club he left so bitterly last January. The Chilean has been an expensive failure at United but this was an ideal response even if he was not at his best. Paul Pogba, though, was once again hugely impressive as he continued his post-Mourinho comeback. For Arsenal, after the boost of their win against Chelsea, this was an undoubted set-back with the added frustration of losing two more key players – Laurent Koscielny and Sokratis – to injury. It spilled over close to the end with substitute Marcus Rashford and Sead Kolasinac clashing by the touchline and players from both sides piling in. By then Arsenal had lost their heads. There were 10 minutes…