Match ends, Eibar 0, Barcelona 4.
Eibar 0-4 Barcelona
Defending champions Barcelona maintained the pressure on Spanish title rivals Real Madrid and Sevilla with a routine win at mid-table Eibar.
Substitute Denis Suarez, who replaced the injured Sergio Busquets, opened the scoring with a crisp 20-yard drive.
Barca increased the tempo after the break, doubling their lead when Lionel Messi cushioned in Luis Suarez's pass.
Luis Suarez robbed defender Florian Lejeune to drill in clinically before Neymar converted an injury-time cross.
Victory moved third-placed Barca two points behind leaders Madrid, and a point adrift of Sevilla, at the halfway stage of the Spanish season.
Madrid - who edged past Malaga at the Bernabeu on Saturday - still have a game in hand on their nearest rivals though, after missing a league game in December when they took part in the Club World Cup.
Victory comes at a price for Barca
While Barcelona coach Luis Enrique will be pleased with his team's professionalism in seeing off ninth-placed Eibar, he was less than happy at seeing holding midfielder Sergio Busquets taken off on a stretcher inside the opening 10 minutes.
The Spain international, 28, fell to the ground instantly when an over-the-ball challenge caught him on the right ankle.
He received treatment on the field before being lifted on to a stretcher by medical staff and carried off down the tunnel.
Barca later confirmed Busquets had sprained an ankle ligament and would have more tests on Monday to determine the severity of the injury.
Enrique, who is already without skipper Andres Iniesta through injury, appeared to be positive about the loss of another key member of his midfield trio.
"We leave here with one piece of bad news which is Busquets's injury although it's not as serious as we thought," he said.
Eibar continue to suffer against Barca
Eibar, a tiny Basque club who attract crowds of fewer than 6,000 and generate a fraction of Barcelona's vast income, are one of Spanish football's remarkable success stories.
They reached the top flight for the first time in 2014, but their promotion was only ratified after they raised 1.7m euros (£1.35m) to meet the league's demands over the amount of working capital generated by a club.
Eibar narrowly avoided relegation in their debut season, going on to finish a credible 14th last year, and are aiming for an even higher final placing this time.
However, their miserable record continued against Barca as they were condemned to another heavy defeat by the 24-time Spanish champions.
Back to Copa del Rey action for both clubs. Holders Barcelona host Real Sociedad on Thursday with a 1-0 lead in their two-legged quarter-final.
Eibar, playing in their first quarter-final, will try to overturn a 3-0 deficit at home to Atletico Madrid on Wednesday.
In the other two ties, Real Madrid trail 2-1 as they visit Celta Vigo and Alaves start with a 2-0 lead at home to second division Alcorcon.
- 7CapaBooked at 39mins
- 15Dos Santos
- 19LunaSubstituted forRiveraat 82'minutes
- 5EscalanteBooked at 26mins
- 24GonzálezSubstituted forRicoat 74'minutes
- 8InuiSubstituted forPeñaat 78'minutes
- 9EnrichBooked at 44mins
- 22Mesa Travieso
- 25Dias Correia
- 1ter Stegen
- 20SergiSubstituted forVidalat 65'minutes
- 5BusquetsSubstituted forD Suárezat 10'minutes
- 7TuranBooked at 42mins
- 9L SuárezSubstituted forAlcácerat 76'minutes
- 6D Suárez
- 21André Gomes
- José María Sánchez Martínez
- Shots on Target
Second Half ends, Eibar 0, Barcelona 4.
Corner, Eibar. Conceded by Samuel Umtiti.
Goal! Eibar 0, Barcelona 4. Neymar (Barcelona) right footed shot from the centre of the box to the bottom left corner. Assisted by Aleix Vidal.
Attempt missed. Gonzalo Escalante (Eibar) right footed shot from the right side of the box is just a bit too high. Assisted by Sergi Enrich.
Attempt missed. Sergi Enrich (Eibar) left footed shot from the left side of the six yard box misses to the right.
Attempt saved. Pedro León (Eibar) right footed shot from outside the box is saved in the top right corner. Assisted by Fran Rico.
Ivan Rakitic (Barcelona) wins a free kick in the defensive half.
Foul by Pedro León (Eibar).
Samuel Umtiti (Barcelona) wins a free kick in the defensive half.
Foul by Sergi Enrich (Eibar).
Attempt missed. Fran Rico (Eibar) right footed shot from outside the box is close, but misses to the left. Assisted by Gonzalo Escalante following a corner.
Substitution, Eibar. Cristian Rivera replaces Antonio Luna because of an injury.
Corner, Eibar. Conceded by Jeremy Mathieu.
Attempt blocked. Sergi Enrich (Eibar) right footed shot from the right side of the six yard box is blocked. Assisted by Pedro León with a headed pass.
Delay over. They are ready to continue.
Delay in match Antonio Luna (Eibar) because of an injury.
Attempt saved. Ivan Rakitic (Barcelona) right footed shot from the right side of the box is saved in the centre of the goal. Assisted by Lionel Messi.
Substitution, Eibar. Rubén Peña replaces Takashi Inui.
Corner, Eibar. Conceded by Jordi Alba.
Attempt blocked. Sergi Enrich (Eibar) right footed shot from the centre of the box is blocked. Assisted by Ander Capa.
Corner, Barcelona. Conceded by Florian Lejeune.
Substitution, Barcelona. Paco Alcácer replaces Luis Suárez.
Substitution, Eibar. Fran Rico replaces Adrián González.
Offside, Barcelona. Lionel Messi tries a through ball, but Neymar is caught offside.
Attempt blocked. Luis Suárez (Barcelona) right footed shot from the right side of the box is blocked. Assisted by Ivan Rakitic with a headed pass.
Corner, Barcelona. Conceded by Yoel Rodríguez.
Attempt missed. Florian Lejeune (Eibar) right footed shot from more than 35 yards misses to the left.
Goal! Eibar 0, Barcelona 3. Luis Suárez (Barcelona) right footed shot from the right side of the box to the bottom right corner.
Attempt missed. Dani García (Eibar) left footed shot from outside the box misses to the left. Assisted by Florian Lejeune following a corner.
Corner, Eibar. Conceded by Marc-André ter Stegen.
Substitution, Barcelona. Aleix Vidal replaces Sergi Roberto.
Attempt saved. Adrián González (Eibar) right footed shot from outside the box is saved in the centre of the goal.
Hand ball by Pedro León (Eibar).
Lionel Messi (Barcelona) wins a free kick in the defensive half.
Foul by Pedro León (Eibar).
Offside, Eibar. Pedro León tries a through ball, but Adrián González is caught offside.
Goal! Eibar 0, Barcelona 2. Lionel Messi (Barcelona) left footed shot from the centre of the box to the bottom left corner. Assisted by Luis Suárez with a through ball.
Foul by Denis Suárez (Barcelona).
Florian Lejeune (Eibar) wins a free kick in the defensive half.