UEFA will conduct a new Champions League last-16 draw at 2pm after a mistake involving Atletico Madrid, Liverpool and Manchester United.
UEFA said a "technical problem" was to blame and resulted in the original draw being declared void.
The issue arose when Group B runners-up Atletico were drawn and their possible last-16 opponents - all group winners - were then put into a separate pot, but United were not included.
How original Champions League last-16 draw unfolded
Teams who met in the group stages are supposed to be kept apart in the last-16 draw. United did not face Atletico in the groups, but Liverpool did, and Jurgen Klopp's side were mistakenly put into the pot to potentially face Atletico - who were then drawn against Bayern Munich.
The original draw had seen United set to play Paris Saint-Germain, while Liverpool had been drawn against Salzburg.
Champions League - original last-16 draw
RB Salzburg vs Bayern Munich
Sporting CP vs Manchester City
Benfica vs Ajax
Chelsea vs Lille
Atletico Madrid vs Manchester United
Villarreal vs Juventus
Inter vs Liverpool
PSG vs Real Madrid
UEFA said in a statement: "Following a technical problem with the software of an external service provider that instructs the officials as to which teams are eligible to play each other, a material error occurred in the draw for the UEFA Champions League Round of 16.
"As a result of this, the draw has been declared void and will be entirely redone."
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