Mario Pasalic has served a timely reminder to Chelsea and Frank Lampard.
The midfielder is currently on loan from the west London outfit at Serie A side Atalanta which means he's playing in the Champions League this season.
And that turned out to be not so good news for Manchester City and Pep Guardiola.
With the hosts trailing 1-0 at the break in their Champions League encounter with the Citizens, they needed a route back into the game and quickly.
Up stepped Pasalic within minutes of the restart.
The Croatia international equalised with a fine header which gave Claudio Bravo - on for Ederson at half-time - absolutely no chance.
All of which hasn't gone unnoticed back in the capital.
Pasalic did sign a new three-year deal at Stamford Bridge prior to returning to Atalanta on loan in the summer, so does that mean he could still have a future with the Blues?
It seems unlikely, but scoring against Chelsea's Premier League rivals has certainly gone down a treat amongst supporters at his parent club.
Take a look at the best responses on Twitter...