Jose Mourinho was spying on opposition teams’ training sessions while Southampton manager Tonda Eckert was still playing football for his secondary school team The now-infamous Spygate, which was broken exclusively by Daily Mail Sport and involved Eckert and his Saints side, stole the headlines for weeks upon weeks back in May. It saw the Saints expelled from the Championship play-off final, after admitting to spying on Middlesbrough and two other rivals.But it turns out that former Chelsea boss Mourinho was participating in the incendiary practice long before it became trendy.That’s according to former Chelsea captain John Terry, who has revealed in the new three-part Netflix docu-series titled MOURINHO – which is due to be released on Tuesday – that Mourinho once managed to get hold of footage of a rival’s training session during his first season in charge of the Blues.In the documentary, Terry said: ‘I remember, we were due to play Bolton and up on the screen is Bolton’s training session from the day before. The new three-part Netflix docu-series titled MOURINHO has revealed that the former Chelsea boss once got hold of a rival’s training session before playing them John Terry revealed in the documentary that Mourinho got a hold of a Bolton Wanderers training session in his first season at the club.’And Big Sam [Allardyce] was like “hit Gallas, he’s not very good in the air” and he was like spitting on the mic. ‘It was just like, wow. Who gets footage from someone’s training ground? I’m actually still not sure where he got the footage from.’ It is unclear whether this was ahead of the home or away fixture during that season, in which Chelsea secured their first Premier League title.If it was ahead of the clash at Stamford Bridge in November 2004, then, much like in the case of Eckert and Southampton, Mourinho’s shady tactics failed to have the desired outcome as Chelsea drew 2-2 with Sam Allardyce’s side.However, if the spying was done ahead of the reverse fixture, then it proved fruitful as Chelsea famously secured the title at the then-named Reebok Stadium, with Frank Lampard scoring a brace in a 2-0 win.The practice of spying has certainly become much more popular in the two decades that have since passed, with Marcelo Bielsa also found to have instructed a colleague to snoop on Derby County’s training ahead of a Championship game in 2019.Leeds were fined £200,000 and reprimanded by the EFL after the club admitted a breach of Regulation 3.4, which states: ‘In all matters and transactions relating to the League, each club shall behave towards each other club and The League with the utmost good faith.’