Barcelona's fourth defeat of the season left them seventh in the standings on 14 points after 10 games, 12 points behind leaders Atletico.
Teenager Curtis Jones grabbed a 58th-minute winner as an injury-hit Liverpool qualified for the knockout stage of the Champions League with a 1-0 win over Ajax Amsterdam at Anfield on Tuesday.
A summary of Saturday night's matches in the Euro 2020 qualifiers.
Images from the Nations League matches.
IMAGES from the Bundesliga matches played across Germany on Tuesday.
Defending champion Germany suffered a shocking defeat, while Brazil, Spain and Argentina -- the other pre-tournament favourites -- managed just draws in their opening round matches.
The dazzling Lionel Messi returned from illness to score yet another double to help Barcelona ease into the knockout stages of the Champions League for a 13th successive year with their 2-0 win at Celtic on Wednesday.
Images from the Euro 2020 qualifying matches played on Tuesday night.
IMAGES from the Champions League matches played on Wednesday.
A round-up of results from the Nations League matches played on Sunday
Spain's Alvaro Morata scored a goal in each half as they beat a highly defensive Malta side 2-0 away on Tuesday to move top of their Euro 2020 qualifying group with two wins out of two games.
A summary of Tuesday's qualification matches next year's FIFA World Cup.
'It was a crazy game where we had the bit of luck that we didn't have in Slovenia'
Juventus striker Gonzalo Higuain again showed his killer instinct with two expertly-taken goals in a late 3-1 win at Torino after their less illustrious neighbours had scored first and dominated the Serie A game on Sunday.
Robert Lewandowski scored a brilliant free kick to give Bayern Munich a 1-0 win over Atletico Madrid in their last Champions League Group D outing on Tuesday, ending the 100 percent record of their opponents. The Poland international curled the ball over the wall and into the corner of the net in the 28th minute but the goal had no impact on the final standings with Atletico guaranteed top spot and Bayern in second place.
Sweden striker Zlatan Ibrahimovic crowned a triumphant homecoming with a second-half goal as Paris St Germain crushed Malmo 5-0 on Wednesday to book a place in the last 16 of the Champions League.
Barcelona battled back from a goal down and scored twice in the second half to overcome hosts Borussia Moenchengladbach 2-1 in their Champions League Group C match on Wednesday despite the absence of the injured Lionel Messi.
Manchester City's Sergio Aguero scored a hat-trick as coach Pep Guardiola maintained his 100 per cent record at the club with a commanding 4-0 victory against Borussia Moenchengladbach in their rearranged Champions League Group C opener on Wednesday.
Photos from the Champions League matches played across Europe on Tuesday
Switzerland struck twice in quick succession to stun Euro 2016 champions Portugal 2-0 in a World Cup qualifier on Tuesday and hand them a first competitive defeat in two years under coach Fernando Santos.