Barcelona midfielder Sergio Busquets is doubtful for his team's Champions League last-16 return leg against Manchester City on March 18.
The Spain international was carried off on a stretcher in Wednesday's Copa del Rey match at Villarreal after hurting his right ankle.
A Barcelona statement read: "Tests done on Thursday morning confimed that Busquets has a right ankle syndesmosis injury.
"The player is ruled out for Sunday's league match with Rayo Vallecano at the Camp Nou.
"His availability beyond that will be carefully monitored."
Sergio Busquets has reached an agreement to sign a contract extension with Barcelona until June 2019, the Primera Division giants announced on Thursday.
The Spain international, who has been linked with a move to the Premier League this summer, will put pen to paper on his new deal on Friday.
A statement from Barcelona read: "FC Barcelona have reached agreement with Sergio Busquets to extend his contract with the club until June 30th 2019, with an option for a further year after that.
"The contract will be signed on Friday lunchtime in the club offices at the Camp Nou."
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Barcelona today renamed their first team training pitch after Tito Vilanova, their former manager who passed away from cancer in July 2014.
Vilanova's wife, Montse Chaure, and his two children, Carlota and Adria, attended the ceremony on pitch number one this morning.
The club's president Josep Maria Bartomeu explained: "From now on, all generations that come to train at the Ciutat Esportiva Joan Gamper will know who Tito Vilanova was."
Vilanova guided the Catalans to their 22nd La Liga title after taking over from Pep Guardiola in 2012, but was forced to step aside for surgery in December and later resigned in June 2013 when he suffered a relapse.
Pope Francis is presented with a Barcelona shirt by president Josep Maria Bartomeu as he leads a meeting for the 4th World Congress of Educational Scholas Occurrentes in the Synod hall at the Vatican.
Barcelona defender Dani Alves, who's agent has revealed he is leaving the Spanish giants in the summer, has some very fancy sunglasses.
"Life is cool" says the caption. Yes, yes it is Dani.
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Barcelona full-back Dani Alves is set to leave the Nou Camp when his contract expires in the summer, the Brazilian's agent has announced.
The defender has been linked with a move to Manchester United in recent weeks, which could become a reality after the Catalans failed to open talks with Alves' representatives over a new deal.
"They (Barca) have not gotten in touch with us," Alves' agent Dinorah Santana told Spanish radio station Cadena Ser. "Hence, we interpret that Barca does not want Alves to continue so we will find another club."
Alves expected to remain with the Catalan giants after the summer considering Barca cannot sign any players in 2015 after being banned by FIFA for breaking the rules concerning under-age player transfers.
"It's strange that they would let him (Alves) leave on a free transfer," Santana said. "But if they have not said anything up to now, I believe they do not want to renew Alves' contract."
Barcelona fought back strongly to win 3-2 at Atletico Madrid after Fernando Torres had scored a goal within a minute.
The result sent the Catalans through to the Copa del Rey semi-finals 4-2 on aggregate.
Barcelona levelled on 10 minutes when Lionel Messi linked up with Luis Suarez to put Neymar through to cancel out Torres' strike.
Raul Garcia edged Atletico back in front with with a 30th minute penalty before an own goal by Miranda and a second for Neymar.
Atletico midfielder Gabi was sent off in the 45th minute, and following the restart Arda Turan was booked after throwing his boot in the direction on an official after not winning a foul ..
Mario Suarez also saw red six minutes before the final whistle after his second bookable offence.
Josep Maria Bartomeu believes "social and political issues" may force Barcelona to seek new sponsors next year.
The Spanish giants agreed a five-year deal with Qatar Sports Investment in 2011 worth a whopping £125m.
Club president Bartomeu expressed his gratitude for the substantial investment during an interview with Catalan radio station RAC1, but admits the political landscape has changed since the Gulf state was controversially awarded the 2022 World Cup.
Qatar is an issue where we are looking at other options. Their contract finishes in 2016 and then it could be them or another sponsor.
We're not insensitive to the current situation in Qatar because there are social and political issues there that didn't exist in 2010 and we're sensitive to them.
As a sponsor we're happy and they make a contribution to the club, but we are also looking at other options. It wasn't a bad idea. Qatar have helped us improve the club economically.
Barcelona coach Luis Enrique says the thought of having a team without Lionel Messi is "not even something we contemplate".
The future of the Argentina forward as been the subject of much speculation recently, following reports that he had fallen out with Enrique.
Messi has been linked with a move to Barclays Premier League champions Manchester City and leaders Chelsea, but Enrique does not want to see the four-time former world player of the year leave the Nou Camp.
I don't know what the future holds for us. We all think that Messi will be at Barca in the next few years and that is what all the cules (Barca fans) want.
The thought of having a team without Messi is not even something we contemplate.