Heading into the international break, Barcelona are undefeated and sit on top of La Liga’s table with nineteen points after seven matches.

Thus far, the only blemish on the Spanish giants’ domestic schedule was a nil-nil draw against Malaga. The Catalan side have scored nineteen times in the Primera Division and have yet to concede a goal domestically.

This past weekend, Goalkeeper Claudio Bravo set a new La Liga record for time spent on the pitch without conceding a goal during Barcelona’s 2-0 over Rayo Vallecano. The Chilean international, who signed from Real Sociedad this summer, has now played 630 minutes without letting in a goal.

Lionel Messi is also on the verge of breaking Telmo Zarra’s all-time La Liga scoring record of 251. The Argentinian is now only three goals away from establishing a new Spanish scoring record after finding the back of the net against Rayo.

These early season records and statistics are tremendous achievements for the Spanish giants and have exceeded all of Barcelona’s pre-season expectations. But there are two reasons why opponents of the La Liga giants – as well as rival supporters – should be even more concerned about prospects of lining up against the Catalans this season.

The first being that Barcelona players are still learning manager Luis Enrique’s system. And the second being…the club still have Luis Suarez waiting in the wings.

Luis Enrique’s arrival in Barcelona was greeted with a sigh of relief from players and fans of the La Liga club. Last season’s campaign under Tata Martino was a difficult one, with Barca players finding it hard to adjust to their Argentine boss’ direct style of play.

Much has been made about Martino’s deployment and use of Lionel Messi last season. The player who had dominated world football for the past few years suddenly looked lethargic and unmotivated. Questions even began to surface about Messi’s desire to remain at the club.

Neymar was also pushed out wide and struggled with this unfamiliar role.

But because of the wealth of talent on Barcelona’s roster, the club was able to battle until the very last day of the La Liga season, before ultimately losing out on the league title to Atletico Madrid after a 1-1 draw in the Camp Nou.

The moment the season ended, Martino went out, and shortly thereafter Enrique was ushered in.

The new manager arrived at Barcelona after a spell with Celta Vigo. While at Celta, the Spaniard’s philosophy took time to become fluid with his players. But by the end of the season, the club was flying and became one of the more exciting teams to watch in the Primera Division as they finished in a surprising ninth position on the table.

Right now, Barcelona are still learning Enrique’s system. The goals the club is scoring are starting from the wings, with the full-backs attacking and the forwards working together and playing more central. The center midfielders are also close to each other and Messi has been asked to drop a bit more behind the two strikers.

While the club has been scorching the nets during the early part of the campaign, the players are still familiarizing themselves with their new positioning.

The goals Barcelona has scored have also largely come from a more ‘direct’ style of play.

Fifteen of the nineteen goals the Catalans have scored this season have come from five touches or less.

Gone are the days of Johan Cruyff’s philosophy and Pep Guardiola’s ‘tiki-taka’ play. What fans are seeing now is Luis Enrique’s version of “beautiful” football. The manager doesn’t want his players to go sideways or backwards with the ball. He wants them to beat the lines of defense with every pass.

Barcelona are also pressing high – more so than so then they did last season. Enrique is holding every player accountable during matches. Each individual on the pitch has a job to defend, and there has been a defensive cohesion which has resulted in a string of clean sheets to start the La Liga season.

Whether a player is a starter or if he comes off the bench, Enrique expects them to press, and press in groups. And when Barcelona are able to win the ball back, they have tremendous speed and agility moving forward that terrorizes opposing defenses.

With that said, these players were brought up with the ‘tiki-taka’ school of thinking at the club. It is in their DNA. So the process of replacing that way of thinking and supplementing it with Enrique’s style of play is still a work in progress.

The second – and perhaps scariest – reason for La Liga to be worried about Barcelona is they have yet to unleash Luis Suarez on the Spanish Primera Division.

The former Liverpool striker is coming off of the best season of his career and appears to be a perfect fit to this Barcelona side.

Of course, there is a chance that the introduction of Suarez could upset the development and chemistry of Enrique’s squad.

Concerns have been raised by some in the media that this ‘experiment’ may end up in failure, similarly to when Barcelona brought in Zlatan Ibrahimovic prior to the 2009-10 season.

But those who have seen Suarez train with the team – while the player serves his four month ban from FIFA for biting Italy’s Giorgio Chiellini during this summer’s World Cup – have quelled those concerns and stated that it will only be a short adjustment period for the Uruguayan striker and his Barcelona teammates.

The system that Enrique envisions is for Neymar and Suarez to occupy the striker roles, with Messi dropping right behind them to create chances and finish off plays when he sees the opportunity.

Messi has assisted all but two of Neymar’s seven La Liga goals this season, and the four-time Ballon d’Or winner has tallied six goals and six assists for Barcelona domestically. The thought of Messi playing slightly behind a strike force of Neymar and Suarez will be giving opponents many sleepless nights in Spain.

With Barcelona still getting comfortable with Luis Enrique’s system and Suarez yet to lineup alongside of Messi and Neymar, La Liga should be very worried about what Barcelona could end up doing this season.