Novak Djokovic was hit in the head accidentally by a water bottle after his Italian Open win while the Australian challenge in Rome also took more blows.
Cruz Hewitt, the 15-year-old son of tennis great Lleyton Hewitt, is to make his Junior Davis Cup debut for Australia.
World No.4 and defending champion Elena Rybakina has withdrawn from the WTA Tour's Italian Open in Rome with illness.