Barcelona's centre-back problems have affected the club for a long time, and now they finally seem to have sorted them out.
Gerard Pique has returned to his best form, and Javier Mascherano has never looked more solid beside him as he does now.
They were the foundation that the club's treble success last season was built on.
Pique and Mascherano, together at the back as the club kept a clean sheet against Atletico Madrid in the Vicente Calderon and won La Liga.
It was the same pair, big and little, at the heart of the defence for their subsequent wins over Athletic Club, in the Copa del Rey, and Juventus, in the Champions League.
Furthermore, they also have three decent back-up options. There's Jeremy Mathieu, brought in for €20 million from Valencia last summer.
Though many considered him a needlessly dangerous and expensive purchase, he has proved he belongs at Barcelona with some good performances when required, as well as scoring against Real Madrid in the second Clasico of the season.
Marc Bartra has long been deemed a hot prospect, though his time may never come at the Camp Nou.
Some shaky pre-season performances haven't done him much good, and it's tough to see him getting in ahead of either of the two first choices for a while.
Bartra is definitely a talent, and it would be a shame for Barcelona to see him leave like Martin Montoya, to Inter Milan.
Neither Mathieu nor Bartra covered themselves in glory during the 5-4 victory over Sevilla in the UEFA Super Cup on Tuesday night.
Thomas Vermaelen, meanwhile, finally seems to be fit after missing the entirety of last season, bar the final league game.
So on paper, there's no need for reinforcement. And yet, if Barcelona were offered the chance to sign one player from Athletic Club, they would pick the Bilbao side's centre-back, Aymeric Laporte.
Not because they are lacking their own options, but because at 21 the defender is already a star and has enormous potential. He could go on to become one of the finest in his position in world football.
Laporte signed a new deal with Athletic in June, according to the Guardian, which takes his minimum release fee clause up to €50 million.
He's now contracted to play for the side until 2019, so it's quite unlikely Barcelona will make a move for him any time soon.
But if they could take him from Athletic easily, they would do it in a heartbeat.
If Joan Laporta had won the club presidential election, Goal.com say he would have tried to sign the Frenchman.
Pilar Suarez wrote: "Laporta has a good relationship with Laporte's agent, Jorge Mendes, and sources have told Goal that the club would offer him a five year deal with an annual salary of €3.5 million."
When Barcelona face Athletic in the Spanish Super Cup, Laporte will prove tougher resistance to their sparkling forwards than most defenders do.
He has an extremely cool head and is mature beyond his 21 years. He's faced up to some of La Liga's best players and put his body on the line for the Basque team.
Laporte made his first-team domestic debut in 2012 at just 18 years old and has kicked on massively from then.
Strong in the air and quick to snuff out threats, he has a fine reading of the game and is good with the ball, which suits the way Barcelona play. The latter would be a big selling point for the Catalan side.
If any one man is going to get in the way of Barcelona and the fifth trophy of their potential sextuple, it is Aymeric Laporte.