Were used to it associated with Football in Europe and South America and the annual riots that follow the super bowl in American football but tennis!!!

Four spectators have been arrested at Wimbledon after an incident involving Romanian player Victor Hanescu. TV pictures appeared to show Hanescu spitting towards fans after allegedly being verbally abused. He then walked off court during his third round match.
Police said four youths were held under the Public Order Act after Hanescu had complained to officers.
A Wimbledon spokesman said it was possible the allegation of spitting and the arrests were not related incidents.
The controversy unfolded on Court 18 as Hanescu found himself 3-0 down in the fifth set against Germany's Daniel Brands.
"The initial thought was that the four people arrested were part of the same spitting incident," said the Wimbledon official.
"But the thinking now is that possibly they weren't. That was just a random coincidence. Therefore this alleged spitting incident is directed at a different person or people who we don't know."
A Metropolitan Police spokeswoman said: "Police were called to Court 18 following a disturbance.
"Four youths were arrested. They have all been taken to a south London station under section five of the Public Order Act."
Wimbledon referee Andrew Jarrett has requested a recording of the incident to see if any further action will be taken against the player, who effectively quit the tournament by defaulting his match.
"Victor Hanescu retired from the match due to a leg injury. The referee's office is reviewing further information from this match," said Jarrett.
"The umpire issued a code violation for unsportsmanlike conduct that covers things like spitting and swearing.
"His report will obviously be considered along with any other witnesses that we have from our side and then the referee will obviously look at those and any other footage he's got available to him with his colleagues, and at some stage will make a decision."
A standard offence of unsportsmanlike conduct carries a maximum fine of $10,000 (6,600).
The match finished 6-7 6-7 7-6 6-3 3-0 when Hanescu retired citing a leg injury. He had earlier squandered four match points and the world number 38's frustration was clear as Brands, ranked 98th in the world, clawed his way back into the match.
Court 18 was also host to the longest match in tennis history between John Isner and Nicolas Mahut earlier in the week, when the American Isner beat his French opponent 70-68 in the deciding set of their epic contest.
The match lasted 11 hours and five minutes and took place over three days.

BBC Sport - Tennis - Wimbledon 2010: Four arrested after Hanescu incident