Barcelona earned its fourth trophy of 2015 by defeating Sevilla 5-4 in the UEFA Super Cup. The game was rugged affair with three goals in the opening 20 minutes and a 4-1 lead for Blaugrana before the hour mark. However, Sevilla stormed back, forced extra time but was struck by fate of the most ironic kind.

Here are the major takeaways from the big game.

Barcelona's Defense is a cause for Concern

Before we move on to the positive, it is time to highlight the negative.

Barcelona had not conceded four goals in game at all in 2014-15, a mark reached in the team's opener of the 2015-16 season. More problematic of all was how the goals were conceded.

Two of Sevilla's goals were from dead ball situations and one was a penalty. That said, the backline, which had been so excellent throughout 2014-15 gave up far too many looks to a Sevilla team that really has no major attacking threat with Carlos Bacca in Milan.

The fourth goal was a disastrous display of defensive confusion with everyone caught ball watching.

Moreover, there was a repeated pattern of Barcelona looking flustered after every single goal conceded. Instead of looking to put the game away, Barcelona looked more and more nervous in the face Sevilla's attacks.

The biggest culprit on Barcelona's backline? Jeremy Mathieu. The Frenchman was woeful as a fullback in place of Jordi Alba. He was the cause of the penalty goal and was constantly caught out of position defending the flanks.

He could find himself out of a position rather quickly the moment Alba is ready to go.

Luis Enrique gets his tactics wrong, until fate intervenes

In hopes of calming down the club after conceding Sevilla's third goal, the Barcelona manager took out Rafinha and threw in young Marc Bartra out of position, giving his team a double pivot formation. However, Bartra was not up to the task and was at fault for the eventual tying tally.

The bigger error however was withdrawing Andres Iniesta. The Spaniard is the fulcrum of Barcelona's possession game and without him, the team looked increasingly direct in its attack. With that came a diminishing possession game, thus allowing Sevilla to see more of the ball and have more opportunities to attack.

Iniesta did seem to get banged up at one juncture in the game, but his removal hurt the team's overall attacking prowess.

One of the unforgettable images of the evening was Iniesta looking on from the bench powerless to help. He had been the team's offensive motor; his withdrawal had been its temporary doom.

No depth beyond MSN

With Neymar out, Rafinha got a chance to join Lionel Messi and Luis Suarez in attack. He did a solid job and even scored a goal, but his runs into the middle meant that the team's attack was lopsided and lacked the width Neymar provides.

However, the bigger problem is, outside of the big three, there are no major options for Barcelona to bank on the event of an injury. The MSN carried the team last season and will need to do so with the early signs of the defense being rather troublesome.

Pedro Gets a Happy Ending

One of the big headlines heading into the game was that Pedro had asked to be shipped out of Barcelona. For that he did not start and his seemingly inevitable substitution looked to be his final moment with the club that had given him so much.

Unsurprisingly, he came up huge and scored the game winner of the match, thus cementing himself in Barcelona lore and leaving the club on the highest of notes.