The Ivorian centre-back was the first signing of a summer which excited Reds as then-manager Jose Mourinho added Henrikh Mkhitaryan, Zlatan Ibrahimovic and then Paul Pogba to the squad.
The quartet of signings all made significant contributions as United won the EFL Cup and UEFA Europa League in the 2016/17 campaign.
Bailly, who was serenaded by fans after his arrival with a song including the line 'the greatest Eric since the King', has had an injury-affected season but retains the trust of the boss, demonstrated by a recent three-year deal for the 27-year-old.
Many dream of signing for United, and we've heard from players both famous and unknown about the rush of adrenalin that comes from completing a move to Old Trafford.