I've finally figured it out guys how to remove player's shadow so I'm gonna show and explain it to you guys.
So 1st I've made a video about it for those who would not believe I'm telling the truth:
OK, Let's go step to step(don't think it's that hard to figure it out I was just lucky I noticed this thing )
Step 1:
Open your tennis.ini file and press "ctrlf+f" and search for "3dengine". Under that line you will have to find "Shadow".
Well, when you will go there it will be "Shadow = 2". What you see now is that after this, so from "2" just simply change shadow to "0".
Step 2:
At the "Textures" folder (directory: Tennis Elbow 2013/Data/Models/Textures) you must have a file called "shadowsp.gif". If I guessed right thats the file that gives the shadow of the players. Now replace that with the one I attached to the post:
And you will see that it will surely work fine. I hope you guys can make it for yourselves just like me.