There is a park. In the North of the park there are 4 tennis courts and in the south there are also 4 tennis courts.
Can I ask "Which one do you want to go?" Is this correct?
There are two tennis courts ones in the North and ones in the south, which ones do you want to go?
Will the listener mistake there are only two and not two sets?
Which courts do you want to go to? There are some at the north end of the park and some at the south.