Mike Hussey will stay on after the one-day series as Matthew Hayden struggles with a shoulder injury © Getty Images Enlarge

Matthew Hayden's slow-healing right shoulder has forced Australia to extend Mike Hussey's stay to provide cover for the first Test against New Zealand starting on Thursday. Hussey was due to depart with the one-day specialists but will remain until at least Tuesday.

The progress of Hayden, who strained his right AC-joint in the second ODI, is becoming a concern and he will continue to be monitored daily. "There's no doubt that I'm getting better each day, and I've made plenty of progress since I first damaged the shoulder," Hayden said. "I'm working as hard as possible to get the injury right and believe that I will be fit in time."

Trevor Hohns, the chairman of selectors, said the move was to "cover all our bases". "Hussey has the advantage of already being on tour with the squad, so he is familiar with the conditions and the opposition," he said. "He is a quality top-order batsman in first-class cricket and we believe that he can fill a role in the Test side if required."

Hussey, who has played in the last four ODIs, was thrilled to stay on and if Hayden is passed fit he will re-join Western Australia for the crucial Pura Cup match against Queensland that will help decide the finalists. "Given there are plenty of top batsmen playing at home, it's a nice feeling knowing that the selectors have picked me when, potentially, there is a gap to fill," he said. "I guess I'll have a better idea as to where I stand early in the week."