It's not a fact. The USO got ratings based on Agassi.
He's gone, and the ATP tour is fine.
The players come and go.
And the prizemoney keeps going up.
Women's tennis is exploding.
Players like Mirza and Na Li are bringing tennis to huge populations. And when they retire, everything will still be on the upswing.
This is a global sport. People in the US don't want to believe that, but it's true.
When players like Mirza and Li retire or are no longer competitive, then the interests of those nations will plummet as well.
Indians and Chinese are no different than Americans. When one of their own is doing well, they'll support the sport by buying tix, watching tv coverage. etc. When their chosens ones starts to fail, they'll shift their attention somewhere else.
Btw, is tennis exploding in popularity in Germany without Becker and Graf? don't think so.
Tennis is relatively popular globally. But nowhere is it the first choice.
As for WTA doing so well in Dubai, Doha, and middle east. I would advise caution. Those oil shieks have so much money, they spend it freely on their hobby....until they find a new hobby.
Sheik Maktoum started A1 grand prix on a whim and the league lost over 200 million first year. Second year, he bailed...probably to his next hobby.
Despite all the money spent on Dubai open or Bahrain GP etc., doesn't mean average Arab cares about those sports.
Besides, tennis is very hard to play wearing a burka.