If player swaps are uncommon, then the sight of two managers exchanging clubs is extremely rare. Yet, could Manchester United be at the centre of one over the coming weeks or months? By our count, almost 20 head coaches of varying experience, styles and backgrounds have been linked with the Old Trafford post since that Ineos takeover, Erik ten Hag‘s job still uncertain even if reports suggesting that Sir Jim Ratcliffe and co are drawing up next season’s plans with the embattled Dutchman in mind. One of the names mentioned is that of Thomas Tuchel. HITC’s Graeme Bailey reported this week that t…