Fridolina Rolfo scored a second-half penalty as Barcelona beat Real Madrid 1-0 in El Clásico on Saturday to extend their lead at the top of Liga F to 13 points.
Rolfo broke the deadlock in the 77th minute -- sending goalkeeper Misa Rodriguez the wrong way from the spot -- in front of a record 5,569 crowd at the Johan Cruyff stadium, after Athenea del Castillo had fouled Salma Paralluelo.
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The win saw leaders Barca maintain their 100% record in the league this season, winning 23 out of 23 games so far as they close in on a fourth consecutive league title.
The best of the first half's few chances fell to Barcelona. Aitana Bonmarti had a shot blocked, Marta Torrejon fired over the bar and Misa saved Ana-Maria Crnogorcevic's header, while Caroline Weir had a long-range effort saved at the other end.
After the interval, keeper Misa saved Mapi Leon's free kick and a Patri Guijarro shot flew just off target as Barca pushed for a breakthrough, before Rolfo's penalty set the home side on course for their 11th win over Madrid in 11 meetings in all competitions.
Barca top the Liga F table on 69 points, ahead of Madrid in second with 56, with seven games left to play.