Originally Posted by BobbyOne
But not when we know about many other matches which have been played even though we still need their exact results!
Again, we need at least the location, date, and score (if possible. Knowing the score helps to solidify the result). We can GUESS at the surface, but not always. For example, the pro tournaments at Melbourne in 1964 and 1967 were NOT held at Kooyong, probably indoor at the Olympic pool on cheap carpet. The Australian Tennis Federation had banned the pros from the major outdoor grasscourts.