Barcelona will hope to banish their recent struggles at Anoeta on Wednesday and seal their place in the Copa del Rey final.
Barca have not won at Real Sociedad since May 2007, which will keep them on edge despite a 2-0 advantage from last week's first leg at Camp Nou.
Confidence will be with the La Liga champions though, after their spell off the summit of Spain's top flight was ended after just eight days courtesy of Sunday's 4-1 win at Sevilla.
The Catalans had previously topped the table for 59 weeks and a virtuoso display from Lionel Messi helped them get back to winning ways.
Gerardo Martino claimed the Argentina forward had made Sevilla pay for harsh words from critics in the lead-up to the game and although a record of seven goals in nine outings against the Basques is far from his most impressive return, the Barca coach will hope his number 10 can fire again.
Sociedad will not be giving hope of making the final and can look to last year's 3-2 win over Barcelona at Anoeta - after going 2-0 down - for inspiration.
Early efforts from Messi and Pedro looked to have set Barca on their way to an easy win but a goal from Gonzalo Castro and Gerard Pique's sending off rocked them.
Castro equalised six minutes after the defender's dismissal and Imanol Agirretxe popped up with a dramatic the winner in the 90th-minute.
And Sociedad defender Ion Ansotegi is not ruling out a repeat on Wednesday.
He said: "On our part it is a tremendous motivation to be one step away from the final, but we know that it will be very difficult.
"We have never had a chance to play a final, and this is perhaps the only one.
"People believe (it can happen). There is a magical atmosphere at Anoeta and all the fans can help us so that Barca is not the usual Barca".
The majority of Carles Puyol's appearances this season have come in the Copa, but a back injury is likely to keep him out, while Neymar is doubtful despite training with the first-team squad this week as he recovers from a knee injury.
defenders Javier Mascherano and Jordi Alba may return after missing the win over Sevilla due to league suspensions.
Sociedad will be without the banned Inigo Martinez after his red card in the first leg.
for H. Seferović 61'
for Jon Gaztañaga 67'
for Xabi Prieto 82'
|Campana makes Sampdoria switch|
|Leicester seal Ulloa deal|
|Morata sidelined for seven weeks with knee injury|
|Riviere on target in comfortable Newcastle win|
|Advocaat set for Serbia role|
|Wisdom joins West Brom on loan|
|Bundesliga to consider vanishing foam|
|Five-man shortlist for Ivory Coast|
|´Personal issues´ keep Gervinho away from Roma tour|
|Jedinak raring to go|
|Borini set for Liverpool stay, claims agent|
|Koeman: No bids for Lovren|
|Livermore: England hopes shouldn´t hinge on club side|
|MLS Preview: Tough tests for Conference leaders, Revolution still struggling|
|Mathieu not Barca material, says Marquez|
|West Brom claim unimpressive win in Sacramento|
|Neymar: Brazil behind Germany, Spain|
|Vietnamese police confirm match-fixing players|
|Lucescu blames Joorabchian for AWOL players|
|Robinho undecided on future|
|Rush: Still years left in Gerrard|
|Tiago re-signs with Atletico|
|Puyol against Spain overhaul|
|Agger considering his Liverpool future|
|Peruvian Primera Division Review: Juan Aurich bounce back, Melgar draw with Inti Gas|
|Bayern deny interest in Cuadrado|
|New signings on show in Hull double-header|
|Hooiveld strike sinks Swindon|
|Costa departs Valencia|
|Morata suffers knee injury in training|
|K.League Preview: Seoul, Sangju aim to close gap to sixth, Ulsan host Jeonbuk|
|Lewandowski off the mark on Bayern bow|
|Gerrard retirement will boost Liverpool - Carragher|
|World Cup bidding report due in September|
|Evra bids emotional farewell to United fans|
|J.League Preview: Ventforet Kofu look to escape drop zone, Sagan Tosu battle Kawasaki Frontale|
|Salah spared military service|
|Garcia would welcome Torres return|
|Livermore understands Ince decision|
|Cole happy to get away from English press|
|Evra seals Juve switch|
|Bayern stay was Kroos´ ´priority´|
|Scuffet: Udinese right place to continue developing|
|Gerrard retires from England duty|
|Ambitious Pochettino targets title|
|Aspas eager to put ´bad season´ behind him|
|Atletico Mineiro v Lanus: Visitors out to recover from first-leg loss|
|UEFA Europa League Preview: Sligo, Inter Baku out to finish shocks|
|Hughes expects Bojan decision soon|
|Cech on the mend - Holland|
|Pardew eager to honour crash victims|
|Prandelli hits back at critics|
|Negredo breaks metatarsal|
|Rooney eager to impress Van Gaal|
|Palacios´ Qatar move falls through|
|Wenger rules out striker signing|
|Six Shakhtar players refuse to return|
|Six Vietnamese footballers arrested for match fixing|
|Copa Libertadores Preview: Nacional Asuncion, San Lorenzo to host first legs|
|Mata hopeful of title|
|Napoli bullish about Scudetto chances|
|Colombian Primera A Review: Patriotas Boyaca, Deportes Tolima start with wins|
|Subotic thrilled to be back|
|Germain: Monaco can replace Rodriguez|
|Sullivan confident of Carroll improvement|
|Callejon staying put|
|DC United 3 Chivas USA 1: DC end Chivas´ winning run|
|Liga MX Review: Goalkeeping howler costs champions Leon, Monterrey move top|
|Chilean Primera Division Review: Huachipato, Santiago Wanderers opening-day winners|
|Brazilian Serie A Review: Internacional rout Flamengo, Cruzeiro win again|
|Prosinecki keen on South Korea job|
|Woodward promises new United signings|
|Chelsea´s Omeruo set for Middlesbrough return|
|Africa Cup of Nations Qualifying Review: Lesotho, Congo, Benin take first-leg leads|
|Ecuadorian Primera A Review: Deportivo Cuenco shock leaders Emelec, Independiente held|
|Rodriguez spotted in Madrid|
|Niang and Mastalli earn Milan win|
|Jutkiewicz at the double in Burnley rout|
|Crouch denies Gladbach victory|
|Hertha lead Biermann tributes|
|Vidic makes Inter bow in narrow victory|
|Rodriguez eager to leave Atletico|
|Thai Premier League Review: Buriram fail to close gap on Muang Thong, Chonburi gain ground|
|CSL Review: Guangzhou R&F take advantage as rivals Evergrande are held|
|Juventus and Lazio hold Astori talks|
|Lewandowski and Contento back in training|
|Sunderland target Borini joins Liverpool squad for US tour|
|K.League Review: Jeonbuk hammer Sangmu, Steelers march on|
|UEFA Champions League Preview: Buckley warns St Pat´s, Celtic primed to progress|
|Giaretta reveals Pereyra in demand|
|Kramer confirms Napoli talks|
|Nedved insists Juve key men going nowhere|
|Barton is a manager in the making - Redknapp|
|Monk unfazed from friendly setback|
|Holland: Lukaku not set to leave Chelsea|
|Debut nerves for Lambert|
|Woodward: Van Gaal will make United an attacking force|
|MLS Review: Sporting KC win again, Toronto held|
|Wenger: I´ll talk to Wilshere|
|Redknapp almost retired|
|Allardyce: Home form key for West Ham|
|Luis Enrique: ´We can´t draw conclusions yet´|
|Liverpool agree to sell Borini to Sunderland|
|Late Falque penalty spares Spurs blushes|
|Besler, Zusi agree Sporting KC contracts|