He had been given his introduction to senior football by Guus Hiddink at the end of that 2015/16 season, in a 1-1 home draw with newly-crowned champions Leicester City, before heading out on a trio of loan spells.
They started with helping Brighton earn promotion to the Premier League, and concluded with being named Derby’s Play of the Year after reaching the Championship play-offs under Frank Lampard’s management.
With Lampard becoming Chelsea head coach in the summer of 2019, Tomori returned to the Bridge as part of the men’s first team squad for last season, coming off the bench in the UEFA Super Cup before making his full debut in a 2-2 Premier League draw with Sheffield United.
That was the first of 10 consecutive league starts for the young centre-back, which included his stunning maiden goal for the Blues in a 5-2 victory away at Wolverhampton Wanderers. The strike was later voted as our Goal of the Season by supporters, while the potential he showed in those performances was rewarded with a new five-year contract in December 2019.