What is your level of tennis? Intermediate means you know all the rules of singles and doubles, have an overhead serve, can use all the different strokes, you are willing and able to play matches for two solid hours.
Lower-intermediate. Used to play a lot as a kid, but that was a while back.
When are you available to play?
Weeknights/afternoons are best, but it's flexible.
Are you willing to come to Mythenquai, Frauental or Lengg courts in Zurich to play?
Yep, the first two especially.