It is understood that one of the key reasons why Chelsea chose Tuchel was his record of working with young players and that fits with the new generation of players coming through at the club.
Tuchel, 47, established his career while working as a youth coach in Germany at clubs including Stuttgart and Augsburg before earning his chance at Mainz.
But Tuchel gained a reputation at Mainz and Borussia Dortmund for embracing young players, working closely with the academy and that appealed to the Chelsea hierarchy in looking for a successor.
Chelsea also wanted a German or German speaker to try and build on the growing German influence in the dressing room and Christian Pulisic worked with Tuchel at Dortmund while Brazil defender Thiago Silva knows him from Paris Saint Germain.
But any fears that Chelsea’s blossoming generation of youngsters – like Mason Mount, Reece James and Billy Gilmour – would suddenly be discarded could not be further from the picture that Tuchel has given.
Tuchel has already spoken to the players at a team meeting at the club’s training ground at Cobham and tried to give assurances that they will all be given a clean slate and a proper chance.
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Chelsea owner Roman Abramovich has always championed young players and has enjoyed watching their development under Frank Lampard and they did not want to throw that work away.
But Chelsea will now expect Tuchel to help improve results quickly, they have back-to-back home games with Wolves and Burnley and the hope is they can move up the table quickly.
Tuchel, who also speaks perfect English, is known for his high energy, pressing, entertaining and attacking football which has established him as a big name European coach.
Chelsea director Marina Granovskaia said: “It is never easy to change Head Coach in the middle of the season but we are very happy to secure one of Europe’s best coaches in Thomas Tuchel.
“There is still much to play for and much to achieve, this season and beyond. We welcome Thomas to the Club.”
Tuchel is also known for his abrasive character, for having rows with the hierarchy and can be a difficult personality but Chelsea are prepared to take the gamble and see him as a good fit who was freely available after being sacked by Paris Saint Germain last month.
But Tuchel now has a chance to work at another elite club and, having led PSG to six domestic trophies and last season’s Champions League final, he will want to take the next step with success at Chelsea to establish himself among Europe’s very best.
Tuchel is unlikely to make sweeping changes immediately but has often used a back four, an attacking formation and Chelsea will be hoping that he can get the best out of big name signings Timo Werner and Kai Havertz as the Germany internationals have been underwhelming so far.