The celebration to honour Paris Saint-Germain's first French league title in 19 years was cut short Monday following fights between fans and riot police in which 30 people were injured.
Paris police commissioner Bernard Boucault said three police officers were among the injured from the clashes, a huge embarrassment to a club that has been trying to restore its image following years of fan violence.
Police made 21 arrests and a total of 800 officers were deployed to contain the fans, Boucault said, but it took several hours to bring the situation under control after store and car windows were smashed near the Champs Élysées.
PSG had serious problems with hooliganism from 1985 to 2010. The club then took measures to combat the problem and radically changed its ticketing policy.
"The conclusion you can draw is that there won't be more any more events like this in a public place for Paris Saint-Germain," Boucault said.
Tens of thousands of fans waited patiently for the players, who arrived more than an hour late at the landmark Trocadero plaza. Dressed smartly in dark suits, the players – David Beckham among them – drew loud cheers from the fans. Some in the crowd stood on rooftops, lighted flares and climbed scaffolding.
Sporting director Leonardo did not attend the ceremony after being hospitalised overnight, reportedly for a stress-related ailment. He was released Monday afternoon.
The 1-0 win at Lyon on Sunday night clinched the championship for PSG with two rounds remaining.