LaLiga: Ansu Fati scores again as 10-man Barcelona beat Celta Vigo for second straight win; Sevilla, Real Madrid too register victories
Barcelona won comfortably despite playing more than half the game with 10 men after defender Clément Lenglet was sent off before the break.
Koeman decided to rely on an attack led by Lionel Messi, Antoine Griezmann, Ousmane Dembélé and the 17-year-old Ansu Fati.
LaLiga: Lionel Messi scores in first game since Barcelona transfer dispute; Luis Suarez nets brace for Atletico Madrid
Luis Suarez, whose departure was confirmed on Thursday, marked his Atletico Madrid debut by scoring twice in a 6-1 win over Granada.
Fati is unlikely though to feature in Barca's friendly against Gimnastic Tarragaona on Saturday.
UEFA Nations League: Ansu Fati becomes Spain's youngest goal-scorer in win over Ukraine; Switzerland draws with Germany
Barcelona forward Fati put Spain three goals ahead after just 31 minutes of the League A, Group 4 clash at the empty Alfredo di Stefano Stadium in Madrid with a fine individual strike that came amid a scintillating debut start for his adopted country.
UEFA Nations League: Focus on Germany vs Spain, France vs Croatia, Gareth Bale and Eduardo Camavinga
Second edition of UEFA Nations League gets underway in mid-week just a week after the 2019-20 season ended.
Fati, 17, has been called up for September's Nations League games against Germany and Ukraine after scoring eight goals in 33 matches for the Catalan club last season.
Champions League: Barcelona's Quique Setien relying on Riqui Puig, Ansu Fati in absence of experienced stars
“Both Riqui and Ansu are ready to play,” Setien said Friday. “They have performed and played pretty well and could perfectly well start. And if they do start, I am sure they will be guaranteed to play well.”
LaLiga: Real Madrid unlikely to slip up in final few weeks, says former Spain midfielder Luis Garcia
Garcia said that though Madrid have struggled since the return of football post the coronavirus-enforced break, they have been able to get the desired results
Coronavirus pandemic: LaLiga superstars try to stay fit amid lockdown imposed in Spain due to COVID-19
The coronavirus pandemic prompted the suspension of sporting events around the world, and forced athletes to find ways to stay fit. Quarantined countries like Spain were the most affected ones, and LaLiga teams have taken steps to keep players active while stranded at home.
LaLiga: Teenager Ansu Fati sets league record in Barcelona’s win over Levante; Getafe beat Bilbao to jump to third place
Barcelona’s teenage star Ansu Fati set another scoring record on Sunday when he became the youngest player to get two goals in a Spanish league game
LaLiga: Barcelona sensation Ansu Fati could make an impact off the bench against Real Madrid, says Carles Puyol
Injuries catapulted Fati into the first team this campaign and he caused an instant stir, scoring in a 2-2 draw at Osasuna and thrilling the Camp Nou with a goal and assist in a 5-2 win over Valencia
Champions League: Barcelona's 17-year-old Ansu Fati becomes youngest scorer in competition in 2-1 win over Inter Milan
Inter striker Lautaro Martinez had the ball in the net twice after the break, only for both goals to be disallowed for offside, before Fati smashed in a sublime finish in the final five minutes
Champions League: Antoine Griezmann attempts to find his feet on rocky ground at Barcelona as they host Inter Milan
Antoine Griezmann said he knew it would be tough settling in at Barcelona but it may have proven harder than he thought.
LaLiga: Barcelona's poor start continues with surprise defeat against Granada; Celta Vigo hold Atletico Madrid to goalless draw
Barcelona threw on their stars of the present and the future on Saturday but neither Lionel Messi nor Ansu Fati could save them from a dismal 2-0 defeat away at Granada.
LaLiga: Barcelona wonderkid Ansu Fati aims to represent Spain at FIFA U-17 World Cup after being granted citizenship
Socialist Prime Minister Pedro Sanchez's cabinet approved a request made by the justice minister to give Guinea-Bissau-born Fati Spanish citizenship during its weekly meeting, the spokeswoman said
Champions League: Borussia Dortmund held to goalless draw by patchy Barcelona as Lionel Messi makes first appearance of season
Even with the Argentine on the field, Dortmund looked more dangerous after captain Marco Reus’ 57th-minute penalty was saved by Marc Andre ter Stegen
Champions League: Barcelona coach Ernesto Valverde hints at Lionel Messi's return for opener against Borussia Dortmund
Messi, who has missed the beginning of the season with a calf injury, was named in Barcelona's squad for Tuesday's Champions League opener, though it remains unclear whether the Argentinian will play.
UEFA Champions League: Lionel Messi included in Barcelona squad for Borussia Dortmund clash as he gears up for comeback from injury
Messi has not played since sustaining a calf injury in pre-season but Barcelona coach Ernesto Valverde named him in the group which was on its way to Germany on Monday.
LaLiga: Joan Jordan scores loan goal as Sevilla beat Alaves to move to top of table; Real Madrid edge past Levante
Lopetegui, who had joined Sevilla after being sacked in quick succession by both Spain and Real Madrid, saw one of his close-season signings Jordan produce the winning goal