Marcelo Bielsa isn’t the only one to spy on opposition – Jose Mourinho did it too!

Marcelo Bielsa took responsibility for a Leeds United employee who was acting weird around Derby County's training ground ahead of their Championship match, but he was hardly the first manager to use such tactics. Frank Lampard's Derby County lost to Bielsa's Leeds United 2-0 and much of the focus fell on the pre-match build up …