Thirteen-time winners Real Madrid were drawn against English champions Manchester City while title-holders Liverpool must face Diego Simeone's Atletico Madrid in the Champions League round of 16 following Monday's draw.
A marathon UN climate summit wrapped up with little to show, squeezing compromises from countries over the global warming battle plan but falling well short of what science says is needed to tackle the emergency.
A mistake by Barca's usually excellent goalkeeper Marc-Andre ter Stegen gave the home team an equalising goal that sealed the match.
Awarded Time Magazine's Person of the Year for 2019 on Wednesday, Greta Thunberg accused leaders of turning the COP25 "into some kind of opportunity for countries to negotiate loopholes".
A day after tens of thousands marched in the Spanish capital demanding climate action, seven environmental groups raised concerns over the role of fossil fuel representatives at the COP25 UN summit.
The World Meteorological Organization said global temperatures so far this year were 1.1 degrees Celsius above the pre-industrial average between 1850-1900, making 2019 one of the top three warmest years ever recorded.
The appeal by Inger Andersen, who heads the UN Environment Programme, and others came days before governments gather in Madrid for an annual climate change meeting.
The underwhelming performance of the reigning champions will most likely require them to beat Rafael Nadal's Spain to stand a chance of reaching the knock out phase.
Neither the left nor the right bloc are anywhere near an absolute majority in the 350-seat assembly following Sunday's polls.
The visitors scored a goal in the 18th minute and despite not having a dominating presence, managed to take home 3 points. The win places Real Madrid second in group A, while the home team ends up with the group's bottom spot.
Hundreds of people packed a square in front of Catalonia's regional government headquarters in Barcelona for a rally by the centre-right, pro-union Ciudadanos party.
"This cannot continue. Barcelona does not deserve it," Mayor Ada Colau told reporters, adding that Friday's violence was the worst so far.
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