The victory takes Barcelona up to fourth with 10 points after six games, one point behind surprise leaders Granada, Athletic Bilbao, who visit Leganes on Wednesday, and Real Madrid ahead of their game at home to Osasuna the same night.
A summary of Friday's night's qualifying matches for Euro 2020.
"I've had a bit more luck than in recent weeks, so I'm making the most of it. For a striker, it always works in cycles and I know that. You can't start doubting yourself," Giroud told reporters after the game.
Santi Cazorla scored a 94th-minute penalty as sub-par Arsenal beat Southampton on Saturday with Laurent Koscielny's overhead kick having earlier cancelled out Petr Cech's own goal.
'I think it's unacceptable what he does to Koscielny. He pushes him down, he hits him in the face. I do not understand Mike Dean's decision at all. Why does Diego Costa stay on the pitch and Gabriel is sent off?' 'If you want to speak about Diego Costa with me, it's just to say he played like he has to play and that's why you have full stadiums, you sell to television around the world for millions and millions because the game has to be played like that'
Cesc Fabregas struck the winner as an experimental Spain side came from behind to beat Costa Rica 2-1.
'Barcelona are super favourites for this game and tomorrow everyone is already convinced that we have to be totally focused as a whole squad'
Arsenal will put one of the best Champions League records on the line when they face Olympiakos Piraeus in a showdown for second spot in Group F on Wednesday.
Barcelona will put Manchester City to the sword if they commit the same kind of errors as they did in their Champions League encounter last month, coach Luis Enrique said.
Arsenal beat Fulham 2-0 at the Emirates and Manchester City beat Cardiff City 4-2 at the Etihad before Liverpool could only manage a 2-2 draw at Anfield having trailed 2-0.
Third-placed Inter Milan scored twice in the last six minutes through Stefan De Vrij and Alessandro Bastoni to snatch a 2-1 win at Parma in Serie A on Sunday despite a subdued display. The scarcely-deserved victory left Inter eight points behind leaders Juventus and four adrift of second-placed Lazio with 10 games each to play.
Arsenal all but sealed Champions League qualification for an 18th successive season after they eased past relegation-threatened Hull City 3-1 in the Premier League on Monday.
Manchester United's top-four aspirations suffered a setback as Louis van Gaal's side were blown away 3-0 by Everton.
Arsene Wenger gets another chance to finally beat his old nemesis and keep the Premier League title race alive for a little longer when Arsenal host leaders Chelsea on Sunday.
Arsenal striker Lukas Podolski scored twice in the opening half-hour as the Premier League leaders romped to a 4-0 win over third-tier Coventry City in their FA Cup fourth round tie at the Emirates on Friday.
Cech's solid 'keeping and Liverpool's staunch defence ensured the match ended in a goalless stalemate
Spain struck twice in the second half to overcome a typically spirited Ireland 2-0 in their friendly international at Yankee Stadium on Tuesday.
A full-strength Arsenal added another piece of silverware to their recent FA Cup success by beating Everton 3-1 in the final of the Premier League's Asia Trophy on Saturday.
Bayern Munich dismantled Arsenal 5-1 in UEFA Champions League Group F on Wednesday after a sensational first-half performance to close on the knockout stages with two matches left.
Steve Finn helped England dominate Australia in another Ashes Test at Edgbaston on Friday to take a 2-1 series lead. A day later, there were celebrations across China as Beijing won the rights to host the 2022 Winter Olympics. And, on Sunday, Premier League club Arsenal finally won bragging rights after beating Chelsea 1-0 to clinch the Community Shield to kick-start their season on a positive note. Rediff.com has all this and a lot more action from the week gone by, snapped right here!
Manchester United kept up the positive momentum of their pre-season tour with a 3-1 victory over Barcelona in the International Champions Cup on Saturday in Santa Clara, California.
World champions Spain held on for a 2-1 win over Haiti in a friendly on Saturday as they warmed up for this month's Confederations Cup.
Arsenal must not rest on their laurels after successive FA Cup victories and instead use one of the side's 'best squads' to inspire them to Premier League glory next season.
Rediff.com brings a preview of the main matches coming up this weekend in the English Premier League.
Ousmane Dembele's late strike rescued a 1-1 draw for champions Barcelona at Atletico Madrid but Sevilla moved top with a 1-0 win over Real Valladolid. European champions Real Madrid were humiliated in a 3-0 defeat at Eibar.
Juventus and Inter, who have 42 points each from 17 games, both play on Monday while Lazio, with 39 from 17, have an outstanding fixture at home to Verona to come in early February.
Discarded striker Danny Welbeck returned to demolish Manchester United's hopes of silverware by netting the winner in Arsenal's 2-1 FA Cup quarter-final victory at Old Trafford on Monday.
Arsenal midfielder Aaron Ramsey has suffered a setback in his recovery from a thigh injury, manager Arsene Wenger said on Tuesday.
Spain fullback Mario Gaspar scored with a stunning volley and midfielder Santi Cazorla added a late goal as the European champions handed England a chastening 2-0 defeat in a friendly between the continental heavyweights on Friday.
Rediff.com brings you the previews of the main matches scheduled for this weekend in the English Premier League.
A second-string Spain celebrated coach Vicente del Bosque's two-year contract extension with a 2-1 away win over Equatorial Guinea in a friendly on Saturday that was marred by an injury to Xabi Alonso.
La Liga champions Barcelona began the new campaign with a 3-0 win over Alaves on Saturday with the help of a spectacular under-the-wall free kick from Lionel Messi, who scored twice, and a curling shot from substitute Philippe Coutinho.
Newcastle United's Papiss Cisse struck twice in a 2-1 victory against English Premier League leaders Chelsea.
Cesc Fabregas might have been "Made in Arsenal" but all that matters for his manager Jose Mourinho is that he has been playing "phenomenal" football for top-of-the-table Chelsea.
Jamie Vardy equalled the English Premier League record by scoring for a 10th successive match as his Leicester City side went top after winning 3-0 at Newcastle United while champions Chelsea ended their slump with a 1-0 win over Norwich City on Saturday.
Chelsea ended their slump with a win over Arsenal while seemingly invincible Manchester City lost their 100 per cent record to West Ham United on a day of contrasting fortunes for the Premier League title favourites on Saturday.
Former Real Madrid striker Predrag Mijatovic criticised Gareth Bale for lacking leadership qualities
Liverpool took a giant step towards their first title in 24 years with a 3-2 win at a plucky Norwich City on Sunday, opening up a five point lead over second-placed Chelsea with three matches remaining.
Netherlands revived bitter Spanish memories from last year's World Cup finals when they beat a second-string La Roja 2-0 in a friendly.
Spain coach Vicente del Bosque has called Atletico Madrid's Brazil-born forward Diego Costa into his squad for the first time for this month's friendlies away to Equatorial Guinea and South Africa.