As Manchester United scour the market for Erik ten Hag replacements, recent history provides plenty of reasons to be wary. Not only for the Red Devils themselves, but for the man next to step into a hotseat that would make lava itself feel cool to the touch. With a shortage of proven, so-called ‘elite’ managers on the market – Thomas Tuchel is now the England boss, Julian Nagelsmann is under contract with Germany, while Zinedine Zidane appears to have little interest in moving to the Premier League – the likelihood is that Erik ten Hag’s successor is a man cut from similar cloth. A relatively …