If there's one, his partner may have gotten knocked into your abdomen. You'll need to see a doctor to coax it down. Brushburns aren't deep but their large surface area makes them more likely to become infected than regular gashes. Wash the abrasion thoroughly and keep it covered. Be extra vigilant if you get the wound on artificial turf, which harbors more bacteria than real grass.
Initial treatment is rest and anti-inflammatories.
As soon as pain tolerance permits, start physical therapy to regain motion. In the heat of competition, anything can happen. If someone takes a chunk out of you, go to your doctor immediately. Human bites are deadly serious because of the high risk of infection and disease. No matter how superficial, see a professional.