You have to go back to 1998 when Louis van Gaal was in charge at Camp Nou for a longer run of games without a clean sheet. Back then, the Catalan giants conceded in 12 matches in a row, so if Barca concede in their next two league fixtures against Atletico Madrid and Villarreal, they will equal that record.
Although they have had a strong start to the current campaign and top the league table, the Catalan giants have not shut a team out since the second game of the season. They beat Alaves 3-0 on the opening day and saw off Real Valladolid 1-0 a week later, but have been forced to rely on their goal scoring ability since.
Their next opponents, Atletico, have scored in each of their last six La Liga outings, although Valladolid have been less impressive in front of goal having netted only nine times in the league so far.
Should Barca concede in both games, however, they will have to keep a clean sheet in the derby against Espanyol to avoid beating the run of Van Gaal's side.
That, added to the 4-0 win over PSV on September 18, is the only time Barca have kept a clean sheet since the clash with Valladolid.
They did come close to repeating the trick against Inter at San Siro last week, but an 87th minute Mauro Icardi goal blemished their record.
The Spanish champions did manage to shut out Cultural Leonesa in their Copa del Rey clash on October 31 though.
Their stumble out of the blocks against Betis ensured that they were playing catch-up throughout, with an eventful game seeing them breached at regular intervals.
4 - Barcelona have conceded four goals in a competitive game at the Camp Nou for the first time since April 2003 vs Deportivo (2-4). Surprise. pic.twitter.com/BMpjdsUtG6— OptaJose (@OptaJose) November 11, 2018
Lionel Messi and Arturo Vidal did find the target for the hosts, but the Blaugrana - who had Ivan Rakitic dismissed for two yellow cards - were unable to keep the back door bolted.
They conceded on four occasions in a home league game for the first time since April 2003, when Deportivo La Coruna managed the feat.