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 am just happy to be selected for the ODIs. I am not sure whether I will be picked in the final XI but it is always nice to be picked or selected in the squad because this is like getting rewarded for good work," he told reporters.
"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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Usman Khawaja joins Australian squad as David Warner goes on paternity leave

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