the world tennis number one novak djokovic has been returned to the same melbourne detention centre where he was first held, as his lawyers continue to challenge his latest visa cancellation. the australian government is arguing that his continued presence in the country is undermining their covid vaccine strategy. washington and kyiv have accused russia of preparing to carry out "false sabotage operations" to create a pretext for an invasion of ukraine. the kremlin has denied the reports, but the pentagon says its intelligence showed the plans were well under way. one of borisjohnson�*s ministers has called his behaviour "unacceptable", after downing street apologised to the queen for number 10 staff lockdown parties on the eve of prince philip's funeral. the prime minister didn't attend either party