Australia are hopeful of no further disruptions ahead of the fourth Ashes Test after their squad returned a full round of negative Covid-19 tests. Doubts had descended on the New Year fixture in Sydney when batter Travis Head was found to be carrying the virus prior to the team’s departure from Melbourne on Friday. He was the first player from either side to test positive in what has become a daily screening schedule, but seven members of England’s wider touring party, as well as match referee David Boon, had contracted the virus in recent days. Australia had been braced for a wider spread, having called up three cover players, but their entire squad and the support staff came back negative on New Year’s Day.