I spent many years in quality control. If you want to measure something first of all...you must calibrate your equipment.
In any experiment of any significance you must keep some things constant in order to observe results that are meaningful.
Thank you Stotty for your observations. This forum seems to be making some headway into perceiving reality. Read the first pages of this thread. I cannot believe we have come this far.
Comparing players of today with those of the past is the respectable and honorable thing to do. Tennis has made a mockery of this aspect of the sport.

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