Justin Cochrane will return to Tottenham as Thomas Frank's right-hand man armed with plenty of knowledge of the squad the Dane will inherit.
Cochrane is one of the most highly-regarded coaches in the game right now and his move to Spurs was a blow to Brentford, who had been eyeing him up as a potential successor to Frank. The 43-year-old is also part of Thomas Tuchel's England set-up and is expected to remain so on a part-time basis while at Tottenham.
The former Manchester United development coach spent almost a decade at Spurs' academy as a coach before becoming England U15s head coach and completing his UEFA Pro Licence. Cochrane was also a UEFA technical observer last season, among a group of experienced coaches and former players who work with the UEFA performance analysis unit to produce reports on every one of the organisation's national-team and club competition.
That meant that Cochrane analysed Tottenham during their Europa League run and was actually featured in the matchday programme for the final in Bilbao.
That's because he had the task of examining the role of the full-backs in Tottenham's round of 16 second-leg victory against AZ Alkmaar and this is what he wrote about Pedro Porro and Djed Spence as well as the impact of the inverted full-back system.
"The full-backs are often narrow, which creates more passing options and makes the opposition close the inside, opening up passing lanes for the wide players to go one-on-one," he said. "The narrow full-backs also create central overloads. Once the ball goes wide, there is often a run into the half-space from an inverted full-back or the high No.8 if the full-back is lower.
"The full-back who goes inside must be technically good and able to operate in tight areas. They need to be offensive. The problem they face is the distance of their recovery if the ball has been lost. A full-back must have the ability to receive and play in tight spaces between lines - to play like a midfielder - a key attribute for playing as an inverted full-back.
"The timing of runs forward into the half-space is also important, while recovery runs are too. A player has to get back into position if the ball is turned over. We saw Spurs’ full-backs doing all three of these. When full-backs do invert, how does that affect the other players?
"The centre-backs no longer have an easy pass to a full-back and can sometimes pass straight to a winger. The other midfielders fill the spaces, but there is not a clear pattern. In the Spurs vs AZ game, James Maddison and Lucas Bergvall often dropped into the spaces and looked for a forward pass."