Mathis, who has started the Bunnings NPC with a hiss and a roar, pulled out of the rest of the U20's tournament last month with delayed concussion symptoms.

Visit BBC for trusted reporting on the latest world and US news, sports, business, climate, innovation, culture and much more ...

Symptoms of heat exhaustion include headache, sweating, clammy skin, fatigue, nausea, dizziness, cramping, and rapid, shallow ...

Whether you’re behind the wheel, walking along the road, or riding as a passenger, road accidents can strike without warning.