Raheem Sterling scored a 97th-minute winner and was then sent off for his celebration as Manchester City came from behind to win at Bournemouth.
After his deflected shot looped in, Sterling celebrated by running to celebrate with the City fans and was shown a second yellow card by referee Mike Dean.
The Cherries had dominated the early exchanges and took a deserved lead on 13 minutes when Charlie Daniels drilled home a stunning half-volley off the crossbar from the edge of the area.
But City equalised eight minutes later with their first shot on target, David Silva picking out Gabriel Jesus with a perfectly weighted pass for the Brazilian to roll the ball home.
The goal seemed to spark the visitors into life and they dominated the rest of the half without adding to their score.
Both teams had chances after the break, with Bournemouth's Joshua King and City's Nicolas Otamendi hitting the post.
King had another opportunity to win it for the hosts when he outmuscled Benjamin Mendy, but his shot was straight at Ederson.
Sterling's winner came moments later, sparking wild celebrations and sending City top of the table.
The finale was best summed up by City captain Vincent Kompany, who described it as "madness".
He told Sky Sports: "The first thing I did was say to Benjamin Mendy and Bernardo Silva: 'Welcome to the Premier League.'"
Guardiola, meanwhile, said he did not understand Sterling's red card.
He added: "I am told the card was for celebrating with the fans. We don't invite the fans? Maybe we play without fans?"
---article source: BBC Sport