Referees forced into retirement by death threats, winners stripped of their titles and THAT ghost goal... as the Champions League returns, will this season's action be adding to the eight most shocking moments in the tournament's history?

The Champions League returns once again this week, with some mouthwatering last-16 ties in store.

This season has already thrown up some moments that will stick in the mind, from Manchester United's non-existent defending in Istanbul, to both sets of teams walking off the pitch in Paris when Basaksehir faced PSG.

But Europe's premier club competition has seen some other shocking moments down the years, from match-fixing scandals to harsh red cards and significant referee abuse.

Ahead of the return of the action tonight, Sportsmail goes through the list of the most jaw-dropping moments in Champions League history.