Barcelona 3-0 Juventus: 5 Talking Points, Lionel Messi reigns supreme

2) Juventus' defence was appalling

Juventus' defence was slow to react against Barcelona

Without the services of the injured Giorgio Chiellini, it was up to Andrea Barzagli and Gianluigi Buffon to marshal the back-line at the Camp Nou. And Massimiliano Allegri decided to go with a back-four instead of the traditional back-three (a formation he is yet to use this season).

They had Mattia De Sciglio at right-back, Alex Sandro at left-back and Medhi Benatia to partner Barzagli at centre-back. De Sciglio did not even last the half as he came off injured with Stefano Sturaro replacing him and that was when the dam broke.

3 - Juventus has lost 3-0 away from home for the first time in European Cup / Champions League. KO pic.twitter.com/ToWdF6YEdw

— OptaJose (@OptaJose) September 12, 2017

Sandro has been poor for Juve for quite some time now and it doesn't look like he has prepared well in pre-season for this campaign. Barzagli and Benatia are not the ideal pairing at the back and looked two or three steps behind Barcelona, especially in the second half.

But formations and tactics aside, they simply switched off in the second half. Rakitic's goal showed how disorganised they were at the back, leaving Buffon very vulnerable to clear shots on goal.

Rakitic scores without any pressure from Juventus players

Two defenders had tracked Messi while a third marked Suarez. However, two more in the box were guilty of ball-watching allowing Rakitic all the time in the world to pounce on the rebound from Messi's cross.