Barça have now gone 28 games undefeated, 16 of which in La Liga
Luis Enrique's Barça matched the record established by Pep Guardiola on the blaugrana bench, in 2011, of games unbeaten. In both cases, the Blaugranas have won or drawn 28 consecutive games. The last series of result, which started this season on October the 3rd, was at the time of Barça's latest defeat: in Sevilla, with a final score of 2-1. Since then, the club have gone 15 La Liga games, 7 Copa del Rey games, 4 Champion's League games and 2 Clubs' World Cup games unbeaten.
La Liga's record
Although the overall record is spectacular, the 15 games unbeaten in La Liga seem far from the record of Real Sociedad in the late 70's. The Basque team didn't lose a signle game of the last 6 of 1978-79 La Liga, nor any of the 32 first gams of the following season. This led to two records: 38 straight games unbeaten in La Liga and 32 in one season.
Top European leagues record
A streak that was even bigger than Real Sociedad's was the one of Fabio Capello's AC Milan, which had 58 games unbeaten. Led by 3 Dutch players (Frank Rijkaard, Ruud Gullit and Marco van Basten), the club established that record between 1991 and 1993, spending a whole season (1991-92) unbeaten.
In another big league, the Premier League, Arsenal remained unbeaten during 49 straight games, with Arsène Wenger on the bench and Thierry Henry as the star player.
The European team with most games unbeaten was Steaua Bucharest. Between 1986 and 1989, the Romanian team went winning or drawing during 106 games. Curiously, this streak started just after they beat Barça in the European Cup's final of Sevilla.
There are other teams with large unbeaten streak, although they're from lower leagues, like Sheriff Tiraspol (63 games in the Moldovan league), Celtic Glasgow (62 in Scotland), Levadia Tallinn (61 games in the Estonian league) and Union Saint Gilloise (60 in Belgium).