An early goal by Guingamp's Jeremy Pied was enough to hand champions Paris St Germain their first loss of the French Ligue 1 season, leaving Olympique de Marseille still on top despite their own defeat by Monaco on Sunday.
Neymar made his return to the pitch after a three-month injury lay-off as Paris St Germain celebrated their eighth Ligue 1 title with a 3-1 win against Monaco at the Parc des Princes on Sunday.
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.
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Poland midfielder Grzegorz Krychowiak has signed a five-year contract with Paris St Germain, the French champions said in a statement on Sunday.
Four goals from Zlatan Ibrahimovic spurred Paris St Germain to their fourth successive Ligue 1 title with a 9-0 rout of Troyes, becoming the first team to win the championship after 30 matches.
Italy's Cristiana Girelli bagged a hat-trick and substitute Aurora Galli struck twice as they thrashed Jamaica 5-0 to qualify for the last 16 of the women's World Cup on Friday.
After losing only three league games last season Juventus have now lost the first two of the new campaign as a deserved 2-1 defeat at AS Roma on Sunday condemned the champions to their worst-ever Serie A start.
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News of all that's transpired on and off the football field
Mbappe struck in the 74th minute to put PSG on 80 points from 29 games and on the brink of retaining the title with second-placed Lille, who beat Nantes 3-2 away earlier on Sunday, still 20 points behind having played a game more.
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Cherif Kouachi and Said Kouachi, the two brothers suspected of having attacked the satirical magazine Charlie Hebdo killing 12, were spotted in northern France on Thursday.
News of all that's transpired on and off the football field
News of all that's transpired on and off the football field.
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Lionel Messi dragged Barcelona back from two goals down by scoring twice to snatch a 2-2 draw at home to Valencia in a thrilling encounter.
Cristiano Ronaldo finally became the highest scorer in Real Madrid's history while Bayern Munich set a record for the greatest number of successive wins at the start of a season in the Bundesliga this weekend.
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Zlatan Ibrahimovic bagging four goals, while Juventus and Bayern Munich preserved their leads and FA Cup holders Arsenal were dumped out of the competition.
Real Madrid lifted the FIFA Club World Cup for a record fourth time on Saturday after thrashing local side Al Ain 4-1 in the final in Abu Dhabi with the help of impressive distance strikes in either half from midfielders Luka Modric and Marcos Llorente.
Paris St Germain's Zlatan Ibrahimovic scored his first Ligue 1 goal this season before missing a penalty as they beat En Avant Guingamp 3-0 to extend their lead to four points on Tuesday.
Barcelona lost for the second straight La Liga game in a 1-0 home reverse against Celta Vigo but there was no such trouble for Manchester City, who beat 10-man Manchester United 1-0 thanks to Sergio Aguero.
News of all that's transpired on and off the football field
News of all that's transpired on and off the football field