Jose Mourinho's Chelsea were already Premier League champions when they beat Manchester United at Old Trafford in May 2005...
Now United boss, Mourinho insists there will be no let-up for his former side when the two teams meet this Sunday, live on Sky Sports 1 HD, despite Chelsea looking set to secure the title once again, this time under Antonio Conte.
A typical, superb close-range finish from Ruud van Nistelrooy had put United on course to dampen the Blues' spirits just under 12 years ago, before former Chelsea midfielder Tiago struck a fantastic equaliser from distance.
Thereafter Mourinho - in the opposing dugout - steered the London club to a resolute 3-1 win courtesy of goals from Eidur Gudjohnsen and Joe Cole.
Conte's Chelsea sit 18 points ahead of United as the sides meet this time around, with Mourinho solely focused on a top-four place at his new employers - and preventing a similar outcome to the one he oversaw in 2005 would see United take a big step towards Champions League football.
Watch the above video to revisit Chelsea's 2005 win against Manchester United at Old Trafford