Northern Ireland's UEFA Nations League got to off to a losing start with a 2-1 home defeat against Bosnia and Herzegovina.
Spain were the better side but had to work for a 2-1 UEFA Nations League comeback win against England at Wembley Stadium on Saturday night.
Luis Suarez scored twice and added an assist as Uruguay beat Mexico 4-1 in Houston on Friday.
Brazil got the better of a gritty United States team, running out 2-0 winners at MetLife Stadium in East Rutherford, New Jersey on Friday night.
Italy needed a late penalty from midfielder Jorginho to scrape a 1-1 draw at home to Poland in the UEFA Nations League on Friday, their first competitive game under coach Roberto Mancini.
Belgium handed error-prone Scotland their biggest home defeat in over 45 years as they coasted to a 4-0 friendly win helped by Michy Batshuayi's second-half double at Hampden Park on Friday.
Croatia failed to exact revenge for their Euro 2016 exit at the hands of Portugal in their friendly meeting in the Algarve - despite the absence of Cristiano Ronaldo.
Wales manager Ryan Giggs enjoyed a memorable first home match in charge as they thrashed Ireland 4-1 in the inaugural UEFA Nations League at a rocking Cardiff City Stadium on Thursday.
World champions France never hit top form and had third-choice keeper Alphonse Areola to thank for a 0-0 draw against Germany in their inaugural Nations League game on Thursday, their first appearance since lifting the World Cup.
Marseille came from behind to win 3-2 at Monaco with a last-gasp goal from Valere Germain on Sunday, ending a dismal run against their main Ligue 1 rivals under coach Rudi Garcia.
Serie A title hopefuls Napoli were thumped 3-0 at Sampdoria on Sunday after coach Carlo Ancelotti tinkered with the team, dropping captain Marek Hamsik and forward Jose Callejon.
Schalke 04, last season's runners-up, crashed to a 2-0 home loss to Hertha Berlin courtesy of Ondrej Duda's double on Sunday, their second Bundesliga defeat in two matches.
Lionel Messi and Luis Suarez scored twice each as La Liga champions Barcelona turned on the style to hammer Huesca 8-2 on Sunday and join Real Madrid as the only teams in the league to win their opening three games.
Watford came from behind with two set-piece goals to beat Tottenham Hotspur 2-1 at Vicarage Road on Sunday, ending the visitors' perfect start to the Premier League season while maintaining their own.
Manchester United fans showed their backing for manager Jose Mourinho after Romelu Lukaku struck twice as United returned to winning ways after two successive Premier League losses with a 2-0 victory at Burnley on Sunday.
Alexandre Lacazette scored his first goal of the season in his first start under Unai Emery, handing Arsenal a 3-2 victory away against Cardiff City.
Real Madrid continued their perfect start to the Liga season by thrashing neighbours Leganes 4-1 at the Bernabeu helped by a Karim Benzema double on Saturday.
Cristiano Ronaldo was left waiting for his first Juventus goal after drawing another blank as the titleholders won 2-1 at Parma in Serie A on Saturday to maintain their 100 percent record.
Leon Goretzka scored his first goal for Bayern Munich and set up another to lead them to a 3-0 win at Stuttgart on Saturday.
Raheem Sterling and Kyle Walker each scored as Manchester City defeated Newcastle United 2-1 at the Etihad Stadium on Saturday.
Atletico Madrid suffered their first major setback of the season as they lost 2-0 at Celta Vigo after defender Stefan Savic was sent off midway through a miserable second-half performance by Diego Simeone's side on Saturday.
Radja Nainggolan scored on his delayed Inter Milan debut to set them on the way to their first win of the season on Saturday as they beat Bologna 3-0 away in Serie A.
Kylian Mbappe scored a brilliant late goal before being sent off at the end of Paris Saint-Germain's pulsating 4-2 win at Nimes on Saturday.
Chelsea stretched their perfect Premier League start to four games after second-half goals from substitute Pedro and Eden Hazard gave them a 2-0 home win over Bournemouth on Saturday.
Sadio Mane and Roberto Firmino scored in the first half as Liverpool won their first four Premier League games for the first time with a 2-1 victory over Leicester City on Saturday at the King Power Stadium.
A late stoppage-time goal by substitute Patrick Cutrone gave AC Milan a 2-1 home win over Roma in an electrifying Serie A clash on Friday and eased the pressure on manager Gennaro Gattuso.
Striker Allan Saint-Maximin's powerful deflected shot gave struggling Nice a shock 1-0 away win over Olympique Lyonnais on Friday as Patrick Viera's side earned their first victory in Ligue 1 this season.
Borussia Dortmund twice hit the woodwork but could not score in their first-ever goalless Bundesliga draw against Hannover 96 on Friday.
Burnley's European adventure came to an end on Friday as the Premier League side crashed out of the Europa League playoff round with a 1-1 draw against Olympiakos.
Liverpool will host Chelsea while Frank Lampard's Derby County will visit Manchester United following the third-round draw for the Carabao Cup held on Thursday.
Late goals by central defenders Jose Gimenez and Diego Godin earned Atletico Madrid a 2-0 victory over Juventus in their Champions League round-of-16 first leg at the Wanda Metropolitano, amid more video assistant referee (VAR) controversy.
Late goals from Leroy Sane and Raheem Sterling gave Manchester City a 3-2 win at Schalke 04 in their Champions League round of 16 first leg on Wednesday that put the English side in the driving seat.
Liverpool and Bayern Munich cancelled each other out to draw 0-0 in the first leg of their Champions League round-of-16 clash on a tense night at Anfield.
Barcelona were held to a frustrating 0-0 draw at Olympique Lyonnais in their Champions League last-16 first leg on Tuesday as both sides remained unbeaten in this season's competition.
Marco Asensio scored a late winner for Real Madrid in a 2-1 victory at Ajax Amsterdam, who were left to rue a goal disallowed by the video assistant referee (VAR) in their Champions League round-of-16 first leg on Wednesday.
Tottenham Hotspur will take a commanding lead to the Westfalenstadion next month after beating Borussia Dortmund 3-0 in the first leg of their Champions League round-of-16 clash at Wembley.
Goals from Presnel Kimpembe and Kylian Mbappe left Manchester United with a mountain to climb as Paris Saint-Germain won 2-0 at Old Trafford in the Champions League round-of-16 first leg and Paul Pogba was sent off.
Teenager Nicolo Zaniolo scored a quick-fire double to earn AS Roma a 2-1 win against Porto in their Champions League last-16 first leg on Tuesday.
Manchester United will face Paris Saint-Germain in the Champions League round of 16, while Liverpool have been drawn against Bayern Munich.
Manchester City battled back to winning ways, coming from a goal down to overwhelm Hoffenheim 2-1 in the Champions League with a brilliant Leroy Sane double that ensured they progressed to the last-16 as winners of Group F on Wednesday.
Manchester United endured an undignified end to their topsy-turvy Champions League group stage campaign by losing 2-1 at already-eliminated Valencia on Wednesday and missing their chance of topping Group H.
Olympique Lyonnais earned the point they required to book their place in the Champions League last 16 but needed Nabil Fekir's equaliser 20 minutes into the second half to salvage a 1-1 draw away to Shakhtar Donetsk.
Two goals from striker Guillaume Hoarau led Young Boys to a shock 2-1 Champions League win over already-qualified Juventus on Wednesday to hand the Serie A side their first away defeat in a competitive match for over a year.
Striker Robert Lewandowski scored twice as Bayern Munich sealed top spot in Group E following a thrilling 3-3 Champions League draw at Ajax in which both sides ended with 10 men.
Benfica finished its Champions League campaign with a 1-0 win over AEK Athens on Wednesday.
Real Madrid suffered their heaviest ever home defeat in Europe on Wednesday when the already-qualified Spaniards were thumped 3-0 at the Santiago Bernabeu by CSKA Moscow in the Champions League.
Viktoria Plzen beat struggling Roma 2-1 in the Champions League on Wednesday to earn a Europa League spot.
Tottenham Hotspur made it into the round of 16 of the Champions League, coming from behind to grab a 1-1 draw at Barcelona on Tuesday which saw them finish second in Group B at the expense of Inter Milan.
Paris Saint-Germain reached the round of 16 of the Champions League on Tuesday thanks to an inspired performance by their three-pronged attack of Neymar, Edinson Cavani and Kylian Mbappe in a 4-1 win at Red Star Belgrade.
Inter Milan were knocked out of the Champions League after they could only manage a 1-1 draw at home to Group B's bottom club PSV Eindhoven on Tuesday to finish third behind Tottenham Hotspur.
Mohamed Salah's first-half strike gave Liverpool a 1-0 win over Napoli in Champions League Group C action on Tuesday.
An under-strength Borussia Dortmund deepened AS Monaco's season-long misery on Tuesday with a 2-0 away victory that ensured they finished top of Champions League Group A ahead of Atletico Madrid.
Atletico Madrid were denied top place in Group A of the Champions League on Tuesday after a goalless draw away at Club Brugge in Belgium meant they finished second behind Borussia Dortmund.
Alessandro Schoepf's stoppage time goal gave Schalke 04 a 1-0 win over Lokomotiv Moscow in Champions League Group D action on Tuesday.
Porto struggled to a 3-2 away victory over Galatasaray in their final Champions League group match on Tuesday but the Turks stayed third in Group D and secured a spot in the Europa League's round of 32.
Real Madrid midfielder Luka Modric has ended the Cristiano Ronaldo-Lionel Messi stranglehold on the Ballon d'Or.
Two first-half goals gave Paris Saint-Germain a crucial 2-1 Champions League home win over Liverpool, putting them in a great position to qualify and leaving Jurgen Klopp's side, finalists last season, in danger of elimination.
Napoli swept aside Red Star Belgrade with a typically entertaining performance as two goals from Dries Mertens helped them to a 3-1 win over the former European champions in their Champions League match on Wednesday.
Borussia Dortmund booked their spot in the Champions League knockout stage with a game to spare after a goalless draw against visitors Club Brugge in Group A on Wednesday.
Christian Eriksen kept Tottenham Hotspur's hopes of reaching the round of 16 in the Champions League alive when he came off the bench to score a late winner in his side's 1-0 victory over Inter Milan at Wembley on Wednesday.