Australia are set to ring the changes to their middle order ahead of the third T20 International against New Zealand in Wellington on Wednesday.
New Zealand have won the opening two T20Is in the five-game series by 53 and four runs in Christchurch and Dunedin respectively, with the series now proved entirely to Wellington with Auckland going into lockdown.
“We haven’t got those middle overs right,” McDonald said.
“That may be a reason for us to reinforce that area or make some changes that potentially strengthen that area with both bat and ball.”
New Zealand have posted massive scores of 5-184 and 7-219 in the two matches, led by Devon Conway and Martin Guptill who both scored in the 90s in each game.
As a result, Australia may also entertain bowling changes, having used Kane Richardson, Jhye Richardson, Daniel Sams and Adam Zampa as their front-liners with all-round options Agar, Marcus Stoinis and Glenn Maxwell.
“Zampa at this stage hasn’t gotten into the games but his quality over the last two years which suggests that the next game he probably will have an impact,” McDonald said.
“It is an area that we do need to improve in if we’re going to compete and beat this Kiwi side.
“One thing we can control is the bowling, so we’ll look at how we use our bowling through that phase of the game.
“We’ve got a big squad of 18 players here. Every player that came on this tour is a live chance (to play).”
The prodigiously talented Maxwell has only managed scores of 1 and 3 and has been used sparingly with the ball, while pressure is mounting on captain Aaron Finch after two failures on the back of a poor Big Bash League.
Neither are expected to be dropped for Wednesday’s game but will be under notice, given the competition for spots.