Ok, a quick explanation :
1- You can build the stadium around "Data/Models/Ground.3ds" (but don't include the ground object in your court) ; that should help you get the basic size of the surrounding layout
2- the stadium must be separated in 4 parts : front, left, right & back ; each part is separated in several levels, normally 3 for outdoor, and 4 for indoor ; each part must be 1 object ; objects are named like this :
Crt_B1 = 1st floor of the Back
Crt_F3 = 3rd floor of the Front
Crt_L2 = 2nd floor of the Left
Crt_L1 = 1st floor of the Right
and so on...
1st level should be about 4-5 meters high, 2nd about 5-6m high, and 3rd everything else (4th level behind the roof) ; outdoor stadium total height is about 20m, so 3rd level is about 10m.
3- you should use only 1 texture for the whole stadium
4- seats are separated objects named : SeatA, SeatB, SeatC
A = 1 full seat (so people should seat in the middle of it)
C = 1 seat with only the back part (so people should seat in front of it)
B = 4 seats together with only the back part (so people should seat in front of it)
5- all ads are grouped in 1 object named "Sign"
6- Speed & Time Boards are named BB_MatchTm & BB_ServSpd for the Back ones ; BF_ for the Front ones ; each board is 1 object composed only of 1 rectangle on which will be drawn the Match & Serve Speed
7- Try to Never use Mirror around X Axis (it seems all 3ds Max are kinda bugged when they export it)
That covers all the bases, I guess...