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.
'Real Madrid did not know about it as we were not told by the player, Villarreal or the federation'
"I don't know how this affects my future," Valverde said.
The hard-fought win took Zinedine Zidane's side on to 77 points after 34 games, seven clear of second-placed Barca who visit in-form Villarreal later on Sunday.
News of all that's transpired on and off the football field
Luis Suarez scored four goals and Lionel Messi grabbed a hat-trick as Barcelona all but wrapped up their King's Cup semi-final by crushing Valencia 7-0 in the first leg at the Nou Camp on Wednesday.
News of all that's transpired on and off the football field
Unstoppable duo Andres Iniesta and Lionel Messi helped Barcelona thrash Sevilla 5-0 to win the King's Cup final for the fourth consecutive season on Saturday as they close in on a likely domestic double.
Lionel Messi scored twice as Barcelona crushed Getafe 5-2 on Thursday to stay in the hunt for the La Liga title.
News of all that's transpired on and off the football fieLd
Neto will sign a four-year deal with Barcelona that will keep him at the club until the end of the 2022-23 season and he will replace Dutch goalkeeper Jasper Cillessen who moved the other way on Wednesday.
Lionel Messi requires two more goals to reach 500 for Barcelona and will have his sights set on achieving the milestone against great rivals Real Madrid in Sunday's Clasico.
Champions Barcelona lost 2-0 at Celta Vigo while Getafe earned an important 2-0 win over Girona in their bid to secure Champions League qualification.
Neymar struck twice as Barca beat Atletico Madrid to reach the King's Cup semis
Lionel Messi and Luis Suarez were on target as holders Barcelona thrashed Real Sociedad 5-2 to reach the King's Cup semi-finals for the seventh successive year with a 6-2 aggregate victory on Thursday.
Real Madrid lost 2-1 at home to Celta Vigo in their Spanish King's Cup quarter-final first leg on Wednesday to slump to their second defeat in a row following a record winning streak.
Antoine Griezmann scored twice off the bench as Atletico Madrid sealed a place in the King's Cup quarter-finals with a 3-0 win at home to Rayo Vallecano on Thursday while Valencia also advanced with victory by the same scoreline at Granada.
Champions Liverpool suffered a shock 1-0 defeat to lowly Burnley on Thursday, ending their 68 match unbeaten home record in the Premier League as their title defence continued to fade.
A dominant yet wasteful Real ravaged their rivals in the first half while spurning a string of clear chances at the Santiago Bernabeu.
Here are five talking points from the weekend's action in Spain.
IMAGES from La Liga matches played on Sunday
Late Griezmann strike ends Atletico's away day hoodoo
A magical Lionel Messi goal, the first of a personal double, led treble-chasing Barcelona to a 3-1 victory over Athletic Bilbao in the King's Cup final on Saturday.
The naval officer's father said he was tensed in the last three days after hearing the news about the incident. He said the family members would go Australia to meet his son he was taken there.
Barcelona's last Champions League triumph came in 2015, and since then they have failed to get beyond the quarter-finals while Real Madrid have monopolised the trophy.
Here are five talking points from the weekend in La Liga.
Following a bright start to the season it was another disappointing display by Villarreal, who have one win from seven games in La Liga, before the return at El Madrigal in two weeks.
Lionel Messi became the first player to win 10 La Liga crowns with Barcelona and only the third player from any club to do so.
Barcelona beat local rivals Espanyol 2-0 in the Catalan derby on Saturday to maintain their 10 point lead at the top of La Liga, while Real Madrid scraped a 3-2 win against bottom side Huesca on Sunday.
Holders Real Madrid were sensationally knocked out of the Champions League on Tuesday after being thrashed 4-1 at home by an outstanding Ajax Amsterdam who overturned a first-leg deficit to reach the quarter-finals 5-3 on aggregate.
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 coach Ronald Koeman has defended centre-back Gerard Pique's right to make comments about referees favouring Real Madrid.
Diego Simeone may not have the stomach to reinvent Atletico Madrid again after they suffered another morale-shattering loss to Real Madrid in Saturday's Champions League final.
Real Madrid crashed out of the King's Cup quarter-finals 4-3 on aggregate after being held to a 2-2 draw at Celta Vigo on Wednesday in another major setback for the stuttering European champions.
Karim Benzema scored his sixth goal in four games as Real Madrid beat Alaves 3-0 on Sunday for a fourth successive La Liga victory which took the European champions to within eight points of leaders Barcelona.
Images from the football matches played across Europe on Wednesday.
Real Madrid star striker Cristiano Ronaldo scored thrice to help his side thrash Espanyol 6-0 in a ruthless attacking display in La Liga clash at Santiago Bernabeu.
Real Madrid are the richest soccer club by revenue for the 11th straight year and La Liga rivals Barcelona have leapfrogged Manchester United into second.
Neymar's double helped Barcelona cruise to a 5-0 victory in the first leg of their King's Cup last 16 tie against Elche.
Atletico Madrid have signed striker Luis Suarez from Barcelona, the Spanish clubs said on Wednesday, bringing to an end his six-year stint at the Camp Nou.