Ahead of Chelsea's Champions League clash with Atletico Madrid last week, Thomas Tuchel sat down to speak with Rio Ferdinand.
Before the BT Sport pundit could get in his first question the German head coach flashed a tongue-in-cheek warning to the former defender.
'If you have a the same impact on my Champions League result like last time, I'll switch to Owen Hargreaves.'
For while there was a considerable last-16 clash ahead, the memory of another was still there, gnawing away at the 47-year-old.