UCL last 16 re-draw: PSG vs Real Madrid, Atleti vs Man Utd & Liverpool vs Inter

A re-draw for the Champions League last 16 has pitted Manchester United against Atletico Madrid after Ralf Rangnick’s side had initially been drawn to face Paris Saint-Germain.

A surprise turn of events saw the initial last-16 draw declared void after what UEFA called a "technical error" involving Atletico Madrid, Liverpool and Manchester United.

The re-draw took place three hours later, and Liverpool now face Serie A champions Inter Milan, Chelsea drew Ligue 1 winners Lille - having done so in the first draw as well - while Manchester City will take on Sporting Lisbon.

United looked to have been offered the biggest reprieve after drawing PSG in the initial draw, but a meeting with Atletico in European competition since 1991 will still be a stern test for Ralf Rangnick's side.

Meanwhile, Real Madrid will perhaps feel the most aggrieved, they were drawn against Benfica in the morning but will now face PSG instead.

Champions League last-16 draw

Salzburg vs Bayern Munich

Sporting Lisbon vs Manchester City

Benfica vs Ajax

Chelsea vs Lille

Atletico Madrid vs Manchester United

Villarreal vs Juventus

Inter Milan vs Liverpool

Paris Saint-Germain vs Real Madrid

When are the last-16 ties?

The last-16 ties will be split across different weeks, with the first legs taking place on February 15-16 and February 22-23.

The second legs are then on March 8-9 and March 15-16.

How UEFA's Man Utd gaffe prompted re-draw

The Champions League draw was conducted in Nyon by UEFA deputy general secretary, Giorgio Marchetti, and UEFA head of club competitions, Michael Heselschwerdt, with the help of special guest Andrey Arshavin.

Eight balls representing eight runners-up were in one bowl, while eight group winners were in individual pots.

Every winner was to be drawn against a runner-up from a different group and football association.

Heselschwerdt confirmed that the draw process would see one runner-up drawn from the runners-up pot. A computer would then indicate which winners could be drawn against them. Balls containing the names of eligible opponents would be placed together into another bowl, from which one eligible group winner would be drawn and paired with the runner-up.

How the draw farce unfolded...

Draw starts: Benfica are the first team drawn from the runners-up pot - and subsequently paired with Real Madrid.

Villarreal error: Villarreal are drawn from the runners-up pot as Marchetti said: "Villarreal can be paired against all the other seven teams". Arshavin draws Man Utd from the pot of eligible opponents, prompting Marchetti to correct his earlier assertion and say: "This is not possible because Man Utd were in the group so we need to do another one."

Apology: Arshavin instead draws Manchester City but Marchetti apologises for "the technical issue that our draw is experiencing" as a delay occurs in City's name appearing on screen as Villarreal's opponents.

Man Utd missing: Atletico are drawn from the runners-up pot as Marchetti says: "The possibilities are all except Liverpool, who were in the same group, and Manchester United; Manchester United have already been drawn." Manchester United have not already been drawn but Heselschwerdt appears to pick Liverpool and miss picking Man Utd when placing balls representing Atletico's eligible opponents into the bowl. Arshavin draws Bayern to face Atletico.

Draw concludes: The rest of the draw is concluded, with Liverpool drawn against Salzburg and Man Utd eventually drawn against PSG.

Re-draw? The draw concludes but reports emerge of clubs immediately questioning the draw. Sky Sports News contacts UEFA about the possibility of a re-draw.

Draw void! UEFA admits 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" caused a "material error" and declares the draw void, to be re-done later on Monday afternoon.

What are the key dates?

Last 16 first legs: February 15/16/22/23

Last 16 second legs: March 8/9/15/16

Quarter-final & semi-final draw: March 18

Quarter-final first legs: April 5/6

Quarter-final second legs: April 12/13

Semi-final first legs: April 26/27

Semi-final second legs: May 3/4

Final: May 28 - Gazprom Arena, Saint Petersburg