Match ends, Tottenham Hotspur 2, Barcelona 4.
Lionel Messi inspired Barcelona to an enthralling victory over Tottenham at Wembley which condemned the English side to a second Champions League defeat from two games this season.
Messi scored twice in an excellent attacking display from the Spanish champions, who were twice pegged back in a breathless second half.
Former Liverpool midfielder Philippe Coutinho put Barcelona ahead in the second minute at the end of an excellent team move involving Messi, although returning Spurs goalkeeper Hugo Lloris helped the visitors by rushing off his line.
Croatia midfielder Ivan Rakitic then doubled the lead by firing home an acrobatic half-volley off the inside of the post from 20 yards.
But Harry Kane halved Spurs' deficit in the 52nd minute, shortly after Messi had twice hit the post for the visitors.
Messi then put Barca 3-1 in front at the end of another flowing move, only for Erik Lamela to pull another back for Spurs with a deflected shot from the edge of the penalty area.
Messi sealed the result in the 90th minute with a calm finish which gives his side a second successive Champions League win and sees them top Group B.
Mauricio Pochettino's side meanwhile are third but six points behind Barcelona and second-placed Inter Milan, and face a difficult task to progress to the knockout stages.
Messi's two goals in north London take him to five goals in two games in this year's Champions League and mean he has 10 goals in 10 games this season.
But it was not just his goal scoring at Wembley which stood out in a sensational display.
For his side's opener the Argentine played a perfect pass from halfway between Spurs full-back Kieran Tripper and centre-back Toby Alderweireld to team-mate Jordi Alba, who then squared for Coutinho to finish.
At times Messi dropped deeper than his usual forward role and controlled the game from midfield, while he also looked eager to press and track back to win the ball.
He started the move for his first goal - Barca's third - with another excellent pass to Alba from deep before two team-mates dummied the resulting cross, allowing Messi to guide the ball home.
He could have had more goals but twice saw the ball rebound off the post after two trademark drifting runs from the right.
More to follow.
Match ends, Tottenham Hotspur 2, Barcelona 4.
Second Half ends, Tottenham Hotspur 2, Barcelona 4.
Eric Dier (Tottenham Hotspur) is shown the yellow card for a bad foul.
Luis Suárez (Barcelona) wins a free kick in the attacking half.
Foul by Eric Dier (Tottenham Hotspur).
Thomas Vermaelen (Barcelona) wins a free kick in the defensive half.
Foul by Fernando Llorente (Tottenham Hotspur).
Foul by Clément Lenglet (Barcelona).
Harry Kane (Tottenham Hotspur) wins a free kick in the attacking half.
Substitution, Barcelona. Thomas Vermaelen replaces Sergio Busquets.
Goal! Tottenham Hotspur 2, Barcelona 4. Lionel Messi (Barcelona) left footed shot from the centre of the box to the bottom right corner. Assisted by Jordi Alba.
Foul by Arturo Vidal (Barcelona).
Lucas Moura (Tottenham Hotspur) wins a free kick in the defensive half.
Substitution, Barcelona. Arturo Vidal replaces Arthur.
Lionel Messi (Barcelona) wins a free kick in the defensive half.
Foul by Toby Alderweireld (Tottenham Hotspur).
Attempt saved. Davinson Sánchez (Tottenham Hotspur) header from the centre of the box is saved in the centre of the goal. Assisted by Kieran Trippier with a cross.
Corner, Tottenham Hotspur. Conceded by Clément Lenglet.
Attempt blocked. Harry Kane (Tottenham Hotspur) header from very close range is blocked. Assisted by Kieran Trippier with a cross.
Corner, Tottenham Hotspur. Conceded by Clément Lenglet.
Attempt missed. Lucas Moura (Tottenham Hotspur) right footed shot from the left side of the box misses to the right. Assisted by Ben Davies.
Substitution, Barcelona. Rafinha replaces Coutinho.
Attempt saved. Lucas Moura (Tottenham Hotspur) right footed shot from outside the box is saved in the centre of the goal. Assisted by Harry Winks.
Substitution, Tottenham Hotspur. Fernando Llorente replaces Erik Lamela.
Delay over. They are ready to continue.
Delay in match Erik Lamela (Tottenham Hotspur) because of an injury.
Offside, Tottenham Hotspur. Harry Winks tries a through ball, but Harry Kane is caught offside.
Luis Suárez (Barcelona) wins a free kick on the right wing.
Foul by Eric Dier (Tottenham Hotspur).
Delay over. They are ready to continue.
Delay in match Gerard Piqué (Barcelona) because of an injury.
Harry Kane (Tottenham Hotspur) is shown the yellow card for a bad foul.
Gerard Piqué (Barcelona) wins a free kick in the defensive half.
Foul by Harry Kane (Tottenham Hotspur).
Offside, Tottenham Hotspur. Harry Kane tries a through ball, but Ben Davies is caught offside.
Sergio Busquets (Barcelona) is shown the yellow card for a bad foul.
Foul by Sergio Busquets (Barcelona).
Erik Lamela (Tottenham Hotspur) wins a free kick in the attacking half.
Attempt missed. Moussa Sissoko (Tottenham Hotspur) right footed shot from the right side of the box is too high.
Substitution, Tottenham Hotspur. Moussa Sissoko replaces Son Heung-Min.