National figures are currently unknown, but Davyd says he's been contacted by more than 60 troubled venues in the last year.
Nadal, aiming for a record seventh French Open title, was rarely troubled as he recorded a 48th career victory at Roland Garros, a venue where he has only ever suffered one defeat.
It troubled him when people started to write him off in the '90s, when the hits dried up and he began playing smaller venues, partially by design.
However, he then had trouble convincing the venue attendants that it was Public Enemy he had crammed into his back seat.
The trouble with valuing a venue such as the NEC, he added, is the uncertainty of its future performance and the amount of investment needed to make it profitable.
Brand told Richard Bacon the nature of the comedy material led to "fundamentalists" threatening to cause trouble at the venues.
There was also trouble at a World Cup venue in Porto Alegre, where Grêmio fans ripped up seats in Internacional's Beira-Rio stadium after their team had lost the state title.
West Ham United's vice-chairman, Karren Brady, has defended the London Stadium's suitability as a football venue, claiming the trouble that has taken place there this season is down to "teething problems".
But even some who believe USC would run the venue better than the trouble-plagued Coliseum Commission say the deal shortchanges taxpayers.
Every jockey finds trouble here, the most devious and difficult venue for any major race.
