Khawaja has played only three ODIs in his career, the last of which was back in February 2013 against the West Indies. However, the 29-year-old has been a more regular member of the Test team since making his debut in 2011.
Included in the ODI side for the ongoing series after Warner was released to be with his expecting wife Candice, Khawaja said he is happy to get the lucky break.
"I haven't been told anything on whether I will play or not. I am just using my common sense, since David is not there, I am expecting to play," he added.
Asked if being ignored for the shorter format hurt him given his reasonably good showing in the Tests, Khawaja said the disappointment was obvious but he has not let that get in the way of his performances.
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"I want to play as many formats for Australia as possible. I am really happy with how the Test stuff has gone. There is a lot of one-day cricket coming up in the next year and I would love to be a part of it. Hopefully I can contribute moving forward," he said.
"We are number one in the world and I had like to keep it that way," he added.