Complex sentence: During a follow-up practice match at the MCG, players struggled in the day's heat, and ignoring calls to retire, Wills suffered from severe sunstroke; a witness to the scene feared that "it was all up with Tommy".
Split into simpler sentences: During a follow-up practice match at the MCG, players struggled in the day's heat, and ignoring calls to retire, Wills suffered from severe sunstroke. A witness to the scene feared that "it was all up with Tommy".