Spring 2021:

WTN announced as going forward. 

Presumably the USTA is onboard.  

The scale is from 40 (beginner) to 1 (pro) 

with a ranking for singles and doubles. 

Fall 2020:

Not clear yet if a deal can be made with UTR or

will go forward with WTN...

Summer 2019:

USTA along with the ITF and  the LTA

have announced the WTN World Tennis Number Initiative.

Their intention is to create a new more versatile worldwide rating system.

Implementation will begin in the fall of 2019

They have a website which is worldTennisNumber.com