With all due respect to Real Madrid and Manchester United, the best club in the world is Barcelona.

At times, the Catalans appear flawless with an amazing passing strategy, and coming off a season where they took home the Champions League trophy, the La Liga title, and went to the final of Copa del Rey, it's hard to argue that they shouldn't be favored to win more silverware this season.

However, when Barcelona faces main rival Real Madrid in the first leg of the Spanish Super Cup (a match featuring the winners of La Liga and Copa del Rey) on Sunday, they will face a retooled Los Galacticos squad at Santiago Bernabeu.

Jose Mourinho has some new young faces, and they might be the reason Real Madrid makes this season more interesting. It won't be just Cristiano Ronaldo trying to work his magic in 2011-2012.

The biggest addition is Portugal star Fabio Coentrao. The left back can also play left wing, which strengthens the positions that Marcelo had occupied for most of last season. Between Coentrao and Marcelo, and along with elite winger Angel di Maria, the left side is well covered.

Another major addition is Nuri Sahin, a midfielder who arrived from Borussia Dortmund after an excellent season. The Turkey international will likely see a lot of playing time and learn the ropes from Turkish-German midfield starter Mesut Ozil.

Hamit Altintop is another Turkish-German midfielder that was added by Mourinho this summer. Altintop is very versatile, and with Kaka perhaps moving on, Altintop brings his lengthy Bundesliga experience with him to a Real Madrid squad that could use an additional player in his prime.

Forward Jose Callejon has been added to the squad, and will likely be a solid contributor off the bench. The former Espanyol scorer can be counted on to be a catalyst for the offense. French defender Raphael Varane is another young player with a great deal of potential.

Though there is no superstar in the group, Mourinho appears to have focused on adding talent that will fit well in his system. It's been a low-key transfer period, but it may very well prove to be an effective one.

Meanwhile, Real Madrid could expect more production from forwards Gonzalo Higuain and Karim Benzema, who are more match fit than last season.

On the other side of the ball, Barcelona expect to make a major addition with the arrival of Arsenal midfielder Cesc Fabregas. There has been a great deal of talk, but still no deal. Fabregas is expected to join the club, but will likely miss the first leg.

Fabregas is seen as the eventual full-time replacement for aging superstar Xavi Hernandez. Manager Pep Guardiola will have an excellent midfielder off the bench this coming season, which is a luxury few clubs in the world can afford.

Barcelona only added one big name: Alexis Sanchez. The Chilean forward joins the Catalans with the departure of Bojan Krkic. Sanchez is seen as an exciting player, though somewhat untested against elite competition.

For Guardiola, it sometimes doesn't matter who is on the club. Having Lionel Messi, David Villa, and Gerard Pique is great, but the club's success hinges most on the execution of their passing strategy.

Barcelona will likely continue to thrive, and perhaps take home three major trophies this season. They're a club that sometimes appear unstoppable, and it seems as though the only way they can falter is if they beat themselves.

Sunday's match will be an interesting one, simply because Real Madrid will need to make adjustments from last season, and to see if their small changes will pay dividends.