Hello Mark
I am not in Roda at the moment but was told by my son who was using my apartment that there is some work going on at the hotel site area and when he enquired he was told that it was the work on the tennis courts which will be open in July.
Failing this my sons have played in the local tennis club in Los Alcazares which is reached by driving towards the market square but taking a right off the main road just past the Mar Menor Bodega, turn left, then right again and tennis club is on your left. it has several clay courts, grass court, squash court and fees are very cheap.
Don