BARCELONA, Spain (AP) " Barcelona's next two matches will go a long way to making or breaking its Spanish league title defense.
Barcelona hosts league leader Real Madrid in two weeks. But before the season's first "clasico," Luis Enrique's side must try to break its peculiar curse at Real Sociedad.
Not a particularly daunting ground for most visitors, Anoeta Stadium has proven to be a quagmire for Barcelona.
Barcelona hasn't won in its last six visits to San Sebastian, making the trip to the upscale Basque city on the Atlantic coast one of its most difficult of the season.
Barcelona can ill afford another slip on Sunday, when it plays Sociedad a day after Madrid will try to increase its four-point advantage when it hosts struggling Sporting Gijon.
"It will be a very complicated game," Barcelona forward Lionel Messi said of Sociedad. "We will play at a stadium where we haven't been able to win lately and things get complicated. We need to win."
Whether it's the often wet and cold conditions, Sociedad's relatively talented team, or Barcelona's own squad choices, which have included second-choice players in recent years, Sociedad has Barcelona's number.
Barcelona lost at Sociedad 1-0 in April, part of a late-season slide which almost cost it the league title. Barcelona needed to win its last match to secure back-to-back championships.
Sociedad, which won the league in 1980 and 1982, has beaten Barcelona in the last four seasons at home, and is in its finest form in years.
Socieded coach Eusebio Sacristan, a former Barcelona player and reserve team coach who took over for the fired David Moyes last year, has led the club to its best start through 12 matches since 2002, when it finished runner-up.
Sociedad has risen to fifth place after winning its last four matches, outscoring opponents 10-1. Only Madrid's ongoing five-game winning streak surpasses that. Sociedad has also won four in a row at home, including a 2-0 victory over Atletico Madrid.
Offseason signing Willian Jose has a team-leading six goals, while forward Carlos Vela has scored four times, and veteran midfielder Xabi Prieto has added three more.
"This season we have more resources," Sacristan said, while urging his team not to take too much confidence from their positive precedents.
"This is a new season. We have to focus on this match, not on statistics about the past," he said. "We will have to exploit our virtues to the maximum."
Messi and Luis Suarez will be back after Barcelona's top two scorers missed the scoreless draw against Malaga last weekend. Suarez was suspended for accumulated bookings, while Messi was sick. They have eight league goals, matched only by Madrid forward Cristiano Ronaldo.
Messi scored both of Barcelona's goals in its 2-0 win at Celtic in the Champions League on Wednesday.
Barcelona has been better on the road than at home so far. It has won only three of six league matches at Camp Nou, and won five of six away.
Besides Madrid, another team that will be pulling for Sociedad is Sevilla. In third place, the Andalusian side can overtake Barcelona in the standings with a victory over Valencia on Saturday.
This story has been automatically published from the Associated Press wire which uses US spellings