The American tennis industry alone has 18 million players and the industry worldwide has over 100 million players. Americans currently buy approx. 3.4 million new tennis racquets and 127 million tennis balls per year. In the USA the tennis industry is worth over $6 billion dollars*.
* Not counting the gambling that also goes on court-side, and also not counting the sponsorship deals that tennis players make on the side worth millions. eg. Roger Federer made $65 million USD just from sponsorships in 2013.
Tennis is also very popular in the UK, where the tennis industry is worth $2.6 billion. The global value of the tennis industry is in the 10s of billions. So if you counted the sponsorships, the 3rd party gambling, etc then it is worth even more.
Gambling in the tennis industry is so prevalent and common that some gamblers have even found a way to game the system by exploiting a loophole known as "Courtsiding". Courtsiding involves spectators watching a live game and then gambling on the results of individual serves by betting on the person who won the serve seconds before the umpire inputs the results of the serve into the system. Essentially the Courtsider already knows who won the individual serve, so they aren't really gambling like a normal person would as they already know who won the serve when they place the bet at the last second. What they are counting on is the umpire being slow to input the results of the serve into the computer, meanwhile the Courtsider (and often an accomplice) places the bet and seconds later the computers on the online gambling websites are updated with the results, but it is too late. The Courtsider has already won on the virtue of being a second or two faster than the umpire.
Courtsiding has also become so common many tennis events now ban cellphones and the use of bluetooth devices, so some savvy Courtsiders are now hiding their bluetooth devices under their long hair or hats. In Europe there are so many Courtsiders it is even skewing the odds, which means it isn't even profitable in most European countries.
Now you might think, wait, why don't they just have a delay or something to prevent people from doing this? Except nobody knows when the tennis players will win the serve so you can't predict when that will happen. So they can't make a delay as it is too unpredictable.
Many of these online gambling sites (aka bookie websites), especially those in the UK, like Toals and others allow people to bet on almost anything. Sports, politics, many different topics. You can probably even bet on whether the UK will have a no deal Brexit. At present that looks like a guarantee.
Personally I think the only thing I would ever gamble on is horse races, and only for fun. Less than $20 for a single day at the track. Why?
Because I used to work at a racetrack when I was younger. I like horses. Someday I would like to have my own horse farm and do horseback archery.
I also know that in Ontario the horse racing industry is propped up by gambling. Without gambling the industry wouldn't even exist.
So if I lost $20 at the race track that is basically a donation to support Ontario's horse racing industry. Go there, watch the horses, eat some food, donate your $20, and then go home. Enjoy the entertainment of watching the horses thunder past.
That said I am taking my son and wife to the Hanover Racetrack (a small racetrack in Grey County, Ontario) this weekend, where we will get to see the "horsies" go thundering by.
Earlier in the day we will be visiting family and petting kittens.
And then the day after we are going to a petting zoo.
An animal filled Labour Day Long Weekend. Visit family. See kittens, horses and the petting zoo. Wanna bet we will have fun doing all that? You betcha!