Ronald Koeman insisted Barcelona remain upbeat and optimistic in their pursuit of the LaLiga title, despite suffering Clasico pain at the hands of Real Madrid.
Barca left the Spanish capital emptyhanded after Karim Benzema and Toni Kroos guided defending champions Madrid to a 2-1 win on Saturday.
Oscar Mingueza set up a dramatic final half-hour with his second goal of the season for Barca, while Madrid midfielder Casemiro was sent off in the 90th minute.
But Madrid held on at a sodden Alfredo Di Stefano Stadium to seal a third consecutive win against Barca in all competitions for the first time since 1978 as they provisionally moved top of the table, with Atletico Madrid in action on Sunday.
Barca are third and a point off the pace, though they could fall four points adrift if Atletico beat Real Betis.
"Of course we're still upbeat and optimistic because we've produced a serious performance," Barca head coach Koeman told reporters. "We are fighting.
"We lost a match against a team who are fighting to win the league but there are nine matches and all the matches are important for the three best teams.
"It's difficult for all three of us. We will come back, we will fight until the last match."
Barca attempted 12 shots in total in the second half, three of those on target, and nearly snatched a point when Ilaix Moriba struck the crossbar in the 94th minute.
But, Koeman became the first Barcelona coach to lose his first two LaLiga games against Madrid since Joaquim Rife in 1980 (also the first two).
Koeman could not hide his frustration post-match, having felt his side should have had a penalty when substitute Martin Braithwaite went down in the box under pressure from Ferland Mendy.
The former Netherlands boss said: "I'm not the only person who's upset about the decision, or lack of decision.
"The players feel disappointed because of this decision by the referee to not give the penalty and there's players who have been playing for years for Barcelona, so I know. But once again not all decisions were right.
"You should ask the players but I would like to include myself. We know that we've played a good match football wise, the first part, the first half, ok, we were not up to our standards. Real Madrid defended very well in the first half.
"There's no [league] match next week and the title [Copa del Rey final against Athletic Bilbao] is at stake. We have a week to prepare for a difficult match so we'll carry on and we are strong."
Lionel Messi, meanwhile, failed to score in seven consecutive Clasicos in all competitions for the first time in his career.
Coventry City 2-3 Hull City: Tigers win five-goal thriller to keep play-off hopes alive
Hull City kept their hopes of gatecrashing the Championship play-offs alive with a thrilling 3-2 win over beaten FA Cup semi-finalists Coventry City on Wednesday.
Noah Ohio scored the winner with his first touch after coming on as a second-half substitute as Hull moved within three points of sixth-placed Norwich City with two games to play.
Coventry, meanwhile, saw their own hopes of returning to Wembley Stadium for a second successive play-off final all but ended, as they sit six points further back with three matches remaining.
Three days on from their remarkable comeback against Manchester United, the Sky Blues twice fought back to level things at Coventry Building Society Arena. Jaden Philogene's shot squirmed under goalkeeper Bradley Collins to put Hull ahead 31 minutes in, but Kasey Palmer levelled within five minutes with a stunning free-kick.
Hull went back ahead in controversial circumstances on the stroke of half-time, Liverpool loanee Fabio Carvalho converting from the penalty spot despite replays showing Joel Latibeaudiere's foul on Liam Delap took place outside the area.
Mark Robins' men again dragged themselves back into the game as Bobby Thomas headed Jay Dasilva's cross in just before the hour mark, but it was Liam Rosenior's visitors who found a winner.
Thomas went from hero to villain as his poor back pass sold Collins short, and Ohio got a toe to the ball to score the winner, keeping Hull's hopes of Premier League football intact.
Van Dijk: Liverpool have 'no chance' in title race after derby defeat
Virgil van Dijk conceded Liverpool might be out of the Premier League title race after they suffered a surprise 2-0 defeat to Everton in Wednesday's Merseyside derby.
Jarrad Branthwaite and Dominic Calvert-Lewin scored in either half to give the Toffees their first win over Liverpool at Goodison Park since 2010.
Liverpool struggled to find a way through the Toffees' defence despite dominating for long periods, and the Reds' captain says they will not outlast Arsenal and Manchester City without major improvements.
Speaking to Sky Sports, Van Dijk said: "If we play like today, then we have no chance to consider ourselves in the title race.
"We have to just focus on the next game and that will be a tough one anyway, so we will see.
"We're very disappointed, in so many ways. I think everyone has to look at their own performances. Did they really give everything, and do they really want to win the league?
"We're still fighting and there are still games after tonight, but if we play like we did overall in the game today – not winning challenges and giving the referee a chance to give free-kicks like he did many times, then you have no chance to win the title."
Howe: Newcastle performance in Palace defeat 'way off' Spurs win
Eddie Howe admitted Newcastle United's performance in the 2-0 loss at Crystal Palace on Wednesday was "way off" the one that saw them thump Tottenham in their previous game.
Howe's men hammered Spurs 4-0 in their last match, but they never got close to matching the attacking verve from that outing and a Jean-Philippe Mateta double condemned the Magpies to defeat at Selhurst Park.
Newcastle didn't even manage a shot on target until the 87th minute, accumulating just 0.42 xG (expected goals) as the likes of Alexander Isak and Anthony Gordon struggled to make an impact.
Only against Manchester City in August (one) have Newcastle recorded fewer shots on target in a Premier League game this season than their two against Palace, and Howe was critical of his team's display in the loss, one that all but ends their hopes of finishing in the top four.
"[It is a] bad day for us," Howe told Newcastle's club media.
"I thought we were disappointing today, especially in the first 60 minutes. We were way off our levels against Tottenham and our best levels.
"I thought technically we didn't deliver a good performance, and out of possession I don't think it was a particularly good performance either."
Newcastle were unlocked twice for Mateta to score by a Palace side who themselves only generated 0.88 xG.
Howe was left frustrated by the manner in which his side conceded, adding: "I think we'll be disappointed with our performance technically today, and that's probably epitomised by the two goals where we're disappointed with how we've given them the ball in those situations and then how we defended.
"I think the goals sum up aspects of our performance where there was some good, lots of moments that could have led to opportunities, but we were slow to shoot around the box," he said.
The defeat, combined with Manchester United's 4-2 win over Sheffield United, means Newcastle drop to seventh, while eighth-placed West Ham are two points behind with a game in hand.
Newcastle have now lost eight of their last 11 Premier League away games, while they have lost on four occasions in London in the league this term, only doing so more times in a Premier League season in 2000-01 and 2005-06 (both five).
It's been a disappointing season for Howe and his side, especially compared to the heroics of last term when Newcastle finished in the top four, and the Magpies boss knows there's work to be done to get back to those levels.
"It's a day that we have to take our punishment, deal with it, and then try and improve," Howe continued. "It's frustrating because we know we're capable of much better."
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