Casemiro's infant son was in his father's arms prior to kick-off but too young to emerge from the tunnel. The two-year-old Caio, pacified by a dummy, may have removed it to hum along to the nursery rhyme that was the repeated chanting of his father's name.
There are some worthy nominees for the Sir Matt Busby statue but it belongs on Casemiro's mantlepiece. The Brazilian is one of United's few superstar signings in the last decade who have the club aiming for the stars.
The Stretford End rocked to Casemiro's name for several minutes as they savoured his opening goal, extended by the Video Assistant Referee check.
Casemiro, on his haunches, waited anxiously until he received the desired signal and pumped both fists. Read more: United player ratings as Casemiro and Victor Lindelof good vs Chelsea Casemiro sauntered off to the same sound at the interval, his dinked pass supplying Jadon Sancho and Anthony Martial with instructions so straightforward even they could not botch it.