I play tennis in Motong. That's a private tenniscourt and is covered with a roof so we can play every weathertype.
Only when it is very windy (2 sides are open) it's less pleasant.
It costs 120 pesos an hour, so with 2 persons only 60 pesos per person.
The base however is not a neat flat surface and has quite a lot of uneaqualities.
There are others as well like near the Capitol.
That one is open (no roof) and very crowded (because free
).
Also in Valencia is one (I did not play there) and semms to be nicer than the two I mentioned.