Marcelo Bielsa reveals Leeds' undercover tracking of rivals' training goes way deeper than Derby. Marcelo Bielsa admitted Leeds have spied on every team this season as he gave a PowerPoint presentation at an emergency press conference on Wednesday. Twenty-four hours before Leeds took on promotion rivals Derby at Elland Road, a member of Bielsa's staff was spotted at the Rams' training ground and police were called. Frank Lampard and his players were upset by what they felt was a move that crossed the line and while Bielsa admitted it the night of the game, he further clarified his position on Wednesday. The assembled media sat in front of a computer screen which projected a presentation with all of Bielsa's backroom staff stood are at the back of the room. The Leeds manager was joined by trusted translator Salim Lamrani at a small table at the front of the room as he made his way through a detailed presentation. 'I don't want to compare my behaviour with previous behaviour that are similar,' Bielsa said. 'I heard there are others which also affected fair play but absolutely, I don't want to defend myself by attacking others. What I've done is not illegal. It's not specified (in the rules) and it's not restrained. 'We can discuss it, it's not seen as a good thing but it's not a violation of the law. I know that not everything that is legal is right to do.' Reading from a pre-prepared statement, Bielsa added: 'If you observe something without the authorisation of the people being observed we call it spying and we say it is spying. 'I can't say it's the right thing to do but I'm going to explain that I didn't have bad intentions or get an advantage.' Scrutiny intensified on Leeds in the wake of the 2-0 win over Derby with the EFL launching a formal investigation into the matter. Bielsa took responsibility at the time and has now reiterated it has been a common part of the club's operation since he took charge in the summer. Rather than back down June 15, 2018: Leeds United announce Marcelo Bielsa as manager to replace Paul Heckingbottom. He became the highest-paid manager in the club's 99-year history August 5, 2018: Bielsa gets his first competitive win as boss on the opening day of the season with a 3-1 home win over Stoke City August 11, 2018: Leeds beat Derby 4-1 at Pride Park and it later emerges there was someone in the bushes watching Frank Lampard's team train. Bielsa admitted this before the return fixture recently August 14, 2018: Bielsa made it three wins from three with victory over Bolton Wanderers to become the first Leeds manager since Jimmy Armfield in October 1974 to win his first three games August 18, 2018: A 2-0 victory over Rotherham ensures Bielsa's 100 per cent start and he becomes the first manager in the club's history to win his opening four games September 7, 2018: Following an impressive start to life in the Elland Road hotseat, Bielsa is awarded Championship Manager of the Month for August September 22, 2018: The 63-year-old's unbeaten start in charge of Leeds is brought to an end after a 2-1 defeat at home to Birmingham City. Bielsa took responsibility for what he labelled a 'tactical mistake' December 23, 2018: A dramatic 3-2 win away from home against Aston Villa ensured the club sat top of the Championship table at the halfway point in the season January 10, 2019: Leeds are embroiled in a spy row after a member of staff is removed from Derby's training ground by police 24 hours before the two sides meet at Elland Road January 11, 2019: Bielsa takes full responsibility before kick-off but insists that he has done this in other jobs outside of England. Leeds go on to win the game 2-0 January 16, 2019: The former Athletic Bilbao boss gives the assembled media a PowerPoint presentation on the spy storm and explains his involvement. Admits club have watched training sessions of every side this