Conte picked his strongest side for the 1-0 win over Jose Mourinho‘s Red Devils at Stamford Bridge.
In the early rounds, the Italian played a sprinkling of fringe players against Peterborough, Brentford and Wolves.
But Conte went full strength against United — and Blues duly reached the FA Cup semi-final and will now play London rivals Tottenham at Wembley next month.
Conte decided he could not take any risks with Mourinho returning to the Bridge and played his first-choice side instead.
That left a number of Chelsea stars miffed with their manger after being overlooked for another high-profile fixture.