Cement walls for tennis fences?

This must only happen in Singapore ...

Why do so many condominium developers put concrete walls to fence their tennis courts?

I mean, don't these guys know that the balls are just gonna rebound back into the middle of the court or bounce them out of court into the bushes or carpark?

C'mon guys, please just put the regular chain fence.

The chain fences absorb the impact and land the balls usually nicely into the sides of the court.

Your tennis playing residents and guests will thank you for it.