Sensational teenager Ansu Fati shows there is life after legend Messi at Camp Nou.
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.
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.
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.
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.
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.
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.
A round-up of Saturday's action in Serie A, La Liga and Bundesliga.
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.
Barcelona's poor run away to Real Sociedad continued when the champions were held to a 1-1 draw at Anoeta on Sunday and slipped six points behind La Liga leaders Real Madrid before next week's 'Clasico' against their arch rivals.
Barca's second-half stamina key to their massive lead in the standings this season
Images from football matches played across Europe.
Aritz Aduriz's second half hat-trick sent Barcelona spinning to a shock 4-0 defeat at Athletic Bilbao in the first leg of the Spanish Super Cup on Friday.
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.
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.
Barcelona have emerged as favourites to be crowned champions after one defeat in their last 22 Liga games.
Barcelona provisionally went top of La Liga for the first time since October after Luis Suarez, Neymar and Lionel Messi scored in a 6-0 thrashing of Alaves on Saturday although the win was overshadowed by a serious injury to Aleix Vidal.
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.
News of all that's transpired on and off the football field
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.
Lionel Messi said his side were superior to every team in the league after he scored a hat-trick in Sunday's 4-2 win at Deportivo which clinched the club's 25th Spanish title with four games left in the season.
The quarter-final draw was the last in the current format with UEFA adopting an all-new format from the 2024-25 season onwards.
Barcelona striker Luis Suarez has been given a two-match cup ban for using provocative language after their King's Cup last-16 first-leg clash against Espanyol, the Spanish federation said on Friday. At the end of a bad-tempered derby on Wednesday which Barca won 4-1, insults were exchanged by both sets of players in the tunnel after leaving the pitch.
Barcelona's march towards the Primera Liga title slowed on Saturday after a goalless draw with bottom-placed side Malaga.
Barcelona thrashed Sporting Gijon 6-1 to go top of La Liga on a dramatic night in Spain on Wednesday as Luis Enrique announced he was stepping down as the Catalan club's coach at the end of the season.
IMAGES from the La Liga matches played on Tuesday
News of all that's transpired on and off the football field
A round-up of Tuesday's action in the UEFA Champions League.
Luis Suarez picked up a hamstring strain in Tuesday's Champions League match at Bayern Munich.
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.
Barcelona coach Luis Enrique is leaving the Spanish La Liga champions at the end of the season when his contract expires after three trophy-laden seasons at the club.
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Barcelona's preparations for next season were thrown off course on Friday when the Spanish champions unexpectedly announced coach Tito Vilanova was stepping down due to ill health.
Barcelona defender Gerard Pique has decried the fans who booed manager Luis Enrique and the players in Sunday's laboured 2-1 home win over Leganes in La Liga as having a short-term memory.
Barca coach, Luis Enrique says that all is well at Camp Nou and the team is united.
Atletico Madrid secured a hard-fought 2-1 home victory over Real Betis in La Liga on Sunday thanks to an own-goal by Rui Silva and a header by Alvaro Morata as Diego Simeone's side ended a three-game winless run in all competitions.
Coach Ernesto Valverde and midfielder Sergio Busquets were due to give a news conference before the training session but spoke to the media after training due to their late arrival.
'Barcelona are super favourites for this game and tomorrow everyone is already convinced that we have to be totally focused as a whole squad'
Luis Suarez has received a second European Golden Shoe of his career after becoming the leading scorer in Europe's top domestic leagues last season.
Barca are also planning to offer new deals to forwards Lionel Messi and Luis Suarez, and midfielder Ivan Rakitic before the end of the year.
When Barcelona host local rivals Espanyol on Saturday hoping to edge closer to the La Liga title, many may be haunted by Raul Tamudo's 89th minute equaliser which wrecked their title bid in 2006/07.
