The Catalans are overwhelming favourites to win the game and have an outstanding home record in the Champions League, remaining unbeaten at the Nou Camp in the competition since losing to Bayern Munich in 2013.
Messi agreed no-fee Barca exit clause in case of Catalan independence
Images from football matches played across Europe.
Ousmane Dembele struck early and Lionel Messi converted a late penalty as Barcelona won 2-0 at Juventus in the Champions League on Wednesday after Alvaro Morata had three goals disallowed for offside for the Serie A side.
Leicester City's Kelechi Iheanacho scored two poacher's goals as they beat Manchester United 3-1 in their FA Cup quarter-final on Sunday to set up a last-four clash against Southampton.
Holders Barcelona reached the King's Cup semi-finals with a 2-0 win over Espanyol on Thursday to overcome a first-leg deficit on a night when new signing Philippe Coutinho made his debut.
The home side spurned two chances to extend their advantage before the break but Barca levelled in the 52nd minute when Luis Suarez glanced in Lionel Messi's free kick.
Sensational teenager Ansu Fati shows there is life after legend Messi at Camp Nou.
Barcelona have emerged as favourites to be crowned champions after one defeat in their last 22 Liga games.
'I want to be somewhere I feel wanted and respected. If that's here then I'll be delighted but if it's somewhere else then I'll be the one who decides where, not anyone else.'
'It has been good on pitch and off pitch,' Lampard said.
Barcelona dropped points for the third time in four league games as they were held 0-0 by local rivals Espanyol in a heated Catalan derby. Atletico Madrid moved two points clear of Barca at the top of the table, having played a game more, thanks to substitute Thomas Partey's late winner to edge past Levante 1-0. Real Madrid now trail Atletico by five points ahead of their trip to Valencia on Sunday.
Unzue is one of the two leading candidates to succeed Luis Enrique, who announced this month he will leave at the end of this season, along with Athletic Bilbao coach Ernesto Valverde.
Tuesday's match was the latest masterclass from the South American trio, known in Spain as 'MSN', whose goals have put Barca on the brink of repeating 2009's treble of Champions League and Spanish league and Cup triumphs, the only time a La Liga club have achieved the feat.
Lionel Messi scored a penalty for the third Champions League game in a row with the Spaniards maintaining their winning start to the group stage.
Barcelona's Brazil right back Dani Alves has decided to leave the Nou Camp after eight years with the Spanish champions, the club said on Thursday.
Lukaku, who was signed for around 80 million euros (71.2 million pounds) from Manchester United in the close season, is the club's leading goalscorer in Serie A alongside midfielder Stefano Sensi, with three goals.
Serge Gnabry scored twice as Bayern Munich beat Chelsea 3-0, while Antoine Griezmann's second-half equaliser handed Barcelona a vital away goal and earned them a 1-1 draw at Napoli in their Champions League last 16, first leg on Tuesday.
'Robert is an incredible player and he won everything with us. We are incredibly grateful to him.'
A mesmeric Lionel Messi helped Barcelona to come from behind and beat Sevilla 2-1 in a thrilling encounter on Sunday as the champions kept the pressure on La Liga leaders Real Madrid, who saw off Leganes 3-0 thanks to a double from Gareth Bale.
Barcelona midfielder Andres Iniesta has failed to recover from a calf strain and will miss Tuesday's Champions League Group F match at APOEL Nicosia.
News of all that's transpired on and off the football field
Barcelona defender Dani Alves has agreed a two-year contract extension to the end of the 2016-17 season with an option for a further year, the Spanish and European champions said on Tuesday.
A round-up of Saturday's action in Serie A, La Liga and Bundesliga.
It was arguably the greatest comeback in Champions League history and one that very few people saw coming, as punters shied away from backing Barcelona to complete an extraordinary comeback against Paris St Germain on Wednesday.
La Liga leaders Barcelona won a tight and tense 'Clasico' 1-0 at Real Madrid on Saturday, beating their great rivals at their Bernabeu home for the second time in four days and moving a staggering 12 points clear of them in the standings.
A former midfielder for Sporting Gijon, Real Madrid and Barcelona, Luis Enrique won two Liga titles, one Champions League and three King's Cups as Barca coach between 2014 and 2017.
English Premier League leaders Manchester City and Chelsea slugged out a magnificent 4-4 draw at Stamford Bridge.
Barca's fans held up a mosaic before the game reading "Infinite Iniesta". They later revealed a banner saying "Thanks for so much" in tribute to a player who came through the club's academy and spent 16 years pulling the strings in midfield, winning nine Liga titles, four Champions Leagues and six domestic Cups.
Barcelona have denied wrongdoing after local media said Spain's public prosecutor had asked for charges to be brought against the club for alleged tax fraud in last year's signing of Brazil forward Neymar.
La Liga has been on hold since March 10 although president Javier Tebas said last week that the league could start up again on either May 29, June 7 or June 28, adding that the games were likely to be held without spectators. But Barcelona coach Quique Setien does not think it is so simple.
After an even first 45 minutes, strikes from Pablo Sarabia and Wissam Ben Yedder stunned the Catalans and left them needing a second-leg comeback at the Nou Camp for the second consecutive round in the competition.
Luis Suarez grabbed a hat-trick and Lionel Messi bagged two goals as Barcelona began their quest for a third straight La Liga title with a 6-2 rout of Real Betis on Saturday. Arda Turan, whose two goals against Sevilla helped Barca lift the Spanish Super Cup on Wednesday, gave them an early lead at the Nou Camp before Ruben Castro equalised in the 21st minute. Barca went back in front thanks to a trademark 37th-minute goal from Messi before Suarez, La Liga's top scorer last season, made it 3-1 before halftime.
The club could also sell other players to in order to create a new contract for Messi, who is the top scorer in La Liga this season with 13 goals.
Barcelona forward Lionel Messi injured his hamstring and defender Javier Mascherano sustained a more serious knee problem in Tuesday's 2-2 Champions League quarter-final first leg draw at Paris St Germain.
Barca's second-half stamina key to their massive lead in the standings this season
Real Madrid are on the verge of reaching the King's Cup quarter-finals after winning 3-0 at Numancia on Thursday while holders Barcelona still have work to do after being held to a 1-1 draw at Celta Vigo.
Real Madrid and Atletico each slipped 10 points behind La Liga leaders Barcelona after an intense Madrid derby finished goalless and the Catalans picked up an 11th victory in 12 games by winning 3-0 at Leganes.
IMAGES from the La Liga matches played on Tuesday
Barcelona forward Lionel Messi was back on the training pitch on Thursday as he bids to rid himself of a hamstring injury before Tuesday's Champions League semi-final first leg at Bayern Munich.