Postpublished at 20:27 British Summer Time 27 September 2020
Barcelona 2-0 Villarreal
Jordi Alba has a crack now from a tight angle but it's tipped around the post by Sergio Asenjo.
Messi makes first competitive Barca appearance since trying to leave
Koeman taking charge of Barca for first time in La Liga
Updates - Roma v Juventus, Reims v PSG
Emlyn Begley
Barcelona 2-0 Villarreal
Jordi Alba has a crack now from a tight angle but it's tipped around the post by Sergio Asenjo.
Barcelona 2-0 Villarreal
Another slick Barca move. Ansu Fati speeds down the left and finds Lionel Messi, whose shot is blocked.
Barcelona 2-0 Villarreal
If Ansu Fati scores again he would be the youngest ever La Liga hat-trick scorer. He is 17 years and 332 days old, five days younger than Jose Iraragorri was when he scored three for Athletic Bilbao in a 7-1 win at Real Sociedad on 16 February 1930.
Roma 1-0 Juventus
Aaron Ramsey goes close to an instant equaliser but turns the ball wide at the near post.
Jordan Veretout (31 mins)
Roma lead the champions. Adrien Rabiot blocks a shot with his arm - a proper handball. And Jordan Veretout scores from the spot.
Ansu Fati (19 mins)
Ansu Fati has a second goal! Philippe Coutinho carries the ball from his own half and plays it out left to Fati, who hits a low shot underneath the keeper.
Roma 0-0 Juventus
Roma aren't happy. Edin Dzeko is in on goal and is brought down by Giorgio Chiellini but the referee isn't interested.
Barcelona 1-0 Villarreal
Ansu Fati scored eight goals in 33 games for Barca last season, even though he was technically a Barcelona B player. But he's a proper member of the full Barca squad this season.
Ansu Fati (15 mins)
We have lift-off. Jordi Alba flies down the left, looks up and finds Ansu Fati, who scores a tidy side-footed first-time finish from about 14 yards.
Barcelona 0-0 Villarreal
Lionel Messi has an air-kick and then a blocked shot in the space of a few minutes.
Barcelona 0-0 Villarreal
Barcelona have won their opening fixture in 10 of the last 11 La Liga seasons - with last season against Athletic Bilbao the exception.
This is already Villarreal's third game.
Mauro Icardi (9 mins)
PSG have the lead in France as Mauro Icardi scores his first goal of the season. It was set up by Kylian Mbappe.
Roma 0-0 Juventus
Aaron Ramsey involved again for Juve but his dangerous cross is put behind.
Reims 0-0 PSG
Early chance for Kylian Mbappe but his shot is saved.
Barcelona 0-0 Villarreal
Philippe Coutinho has a shot blocked.
Coutinho scored twice in Barca's last competitive game. Sadly they were for Bayern Munich.
Barcelona 0-0 Villarreal
Lionel Messi involved again, he finds Jordi Alba but the left-back's cross is blocked.
Roma 0-0 Juventus
Juve free-kick as Alvaro Morata heads over the bar. Remember all those headers he scored when he was first at Chelsea.
Barcelona 0-0 Villarreal
Villarreal have a good attack but Sergio Busquets does well to drop into the box and intercept a pass.
Barcelona 0-0 Villarreal
Villarreal boss Unai Emery is wearing a mask on the sideline - although it's not covering his nose.
Barcelona 0-0 Villarreal
LIonel Messi appears to be playing centrally in the early stages. He sprays a ball out left to Ansu Fati, but he's offside.