TEPaul -
I have not been an active tennis player for a couple of decades, since the time I decided to become thoroughly mediocre golfer!
As I mentioned in my prior post, the growth in tennis at the collegiate level is light years ahead of where it was 40-50 years ago. In the 1960's, there were no credible college tennis teams in the Northeast outside of the Ivy League and Army/Navy. Now there are as many quality tennis teams outside the Ivy League in the Northeast as there in it. Few colleges had indoor tennis facilities back then, now they are ubiquitous.
I can offer your this observed information as to the strength/growth of tennis in the 21st century. In the 1970's, the Olympic Club in San Francisco had 4 tennis courts (none lit for night play) and employed 1 teaching professional to service the tennis program. There was no organized inter-club team competition among tennis clubs in Northern California.
The OC now has 8 courts (4 lit for night play) and employs 3 teaching pro's to give lessons and organize/supervise all the events and competitions in which the members participate. The men compete on teams in Northern California Tennis Association sponsored inter-club leagues in at least 4 different levels of play. There are women's teams competing in 2 inter-club leagues as well. NONE of that existed 40-50 years ago! I am quite sure that kind of growth is neither unique to the Olympic Club or Northern California.
Professionals will invariably dominate open competition in any sport. Personally, I think a sport played at the highest level by its most accomplished participants is the best way to promote the interest and growth that sport at ALL levels of participation.
DT