UEFA have confirmed the last-16 draw for the Champions League has been deemed null and void. 

A new draw will take place at 2pm Irish time.

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.

— UEFA (@UEFA) December 13, 2021

Controversy emerged following the initial draw, held this morning in Switzerland.

One issue arose after Manchester United were drawn to play Villarreal.

That tie could not take place, as the sides were in the same group.

Subsequently United were drawn to play Paris Saint Germain.

However, prior to the PSG draw, it appeared United were incorrectly left out of the pot to face Atletico Madrid.

A number of clubs are said to have raised concerns in the aftermath about the validity of the process.

UEFA then declared the draw void - and their intention to redo the draw later this afternoon at 2pm Irish time.

They say the error occurred due to a technical problem.

"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," UEFA's brief statement read.

In the initial draw, Manchester United's clash with PSG was the tie of the round.