Your camera has the ability to manually set the white balance. Under most circumstances, the auto white balance feature works fine, but since it's very likely you're shooting JPEG, correction after the fact when it does get it wrong is probably going to degrade your image quality a bit. at any rate, page 90 of the English version of the manual for your camera is the instructions for setting white balance. This is needed because, while the white under the lights appears white to us, it really isn't and so the camera needs to have some idea how far from that condition it is and sometimes you have to tell it.

You may also need to learn to shoot in a different mode (such as shutter priority) to control this, I'm not entirely sure on that front (I shoot Nikon, so it's different) reading what the manual has to offer. In any event, I actually recommend you learn to shoot with shutter priority for sports, better control, less likely to have blurry pictures. You can always switch back to auto for other purposes.

One thing to remember... if you change the setting, don't forget to reset it to auto again when done!