Lionel Messi nutmegs James Milner (and leaves him on his backside) after doing the same to Fernandinho as Twitter reacts to Barcelona maestro's masterclass

Lionel Messi's brilliant nutmeg on James Milner left the Manchester City midfielder on his backside, Pep Guardiola covering his face and Twitter reacting to the Barcelona star's masterclass. 

It was Messi's second nutmeg of the match, having already inflicted the same embarrassment on Fernandinho after the Argentina captain's assist created the game's only goal for Ivan Rakitic.

'I've got my legs closed up here,' said Sky Sports commentator Gary Neville, who labelled the Milner nutmeg 'barbaric' and was among those admiring the tutorial from the world's best footballer.

James Milner approaches Barcelona star Lionel Messi during their Champions League tie on Wednesday

Messi slips the ball through Manchester City midfielder Milner's legs at the Nou Camp

Milner slides as Messi nutmegs him and goes the opposite way during their Champions League match

Milner is left on his backside as Messi runs away from the England international with the ball

Former Barcelona manager Pep Guardiola reacts to the nutmeg in the stands at the Nou Camp

Bayern Munich manager Guardiola reacts to the ridiculous skill from Messi during the Barca match

Match of the Day presenter Gary Lineker settled the argument of who's better between the Barcelona star and Real Madrid's Cristiano Ronaldo. 'Messi is indisputably the greatest player ever to don a pair of football boots. Don't even attempt to argue the point,' he tweeted.

Manchester United's Ashley Young simply wrote 'Messi WOW', while Queens Park Rangers striker Charlie Austin added: 'Pep's reaction says it all.'

Liverpool defender Jose Enrique tweeted: 'If Messi played against City on his own, he would still win the game. [He] is amazing. Best in the world when he wants.' 

Stoke City goalkeeper Jack Butland echoed commentator Neville by 'watching the game with my legs closed' and Dutch manager Ruud Gullit added: 'OMG. Messi made Milner famous.'

Then there was Andre Schurrle who simply wrote 'again and again and again...' while darts player Adrian 'Jackpot' Lewis wrote: 'Messi could nutmeg a mermaid.'

England legend Gary Lineker settled the argument of who's better between Messi and Cristiano Ronaldo

Manchester United's Ashley Young was among those admiring the Barcelona star and wrote: 'Messi WOW'

Queens Park Rangers striker Charlie Austin wrote that Guardiola's reaction said it all about Messi's skills

Liverpool defender Jose Enrique wrote Messi could play against City on his own and 'still win the game'

Matt Le Tissier tweeted about how he was sitting back and watching Messi work his magic in Barcelona

Stoke City goalkeeper Jack Butland echoed Gary Neville by 'watching the game with my legs closed'

Dutch manager Ruud Gullit took to Twitter and added: 'OMG. Messi made Milner famous'

Former Chelsea player Andre Schurrle wrote about Messi's nutmegs: 'Again and again and again...'

Darts player Adrian 'Jackpot' Lewis wrote on Twitter that 'Messi could nutmeg a mermaid'

Crystal Palace defender Joel Ward simply used the hashtag #Messi with prayer emoticons 

Former Manchester United and now-Leicester City forward Tom Lawrence added: 'Messi is a joke'

Yannick Bolasie tweeted 'Messi is something else' as Barcelona gave Manchester City a masterclass

Bolton's on-loan midfielder Barry Bannan wrote Messi 'ain't human' after his ridiculous skills

Match of the Day presenter Lineker added more about Messi's greatness following his masterclass