The Courts and Location
Welcome to another in the GSM series. This one may have you seeing double. The Nieass Reserve Tennis Club can be found near Grigg Ct here in Clarence Gardens.
The Cache
The cache is not at the listed coordinates, it can be found close by at
S 34 58.21B E 138 34.5B7
Where
A = number of courts
B = A * 3
FTF by I_J at 11.50am in 0h11m