All 14 squad members have a genuine chance of making the final squad but with Lanning's return, it will likely force one of the top five of Alyssa Healy, Beth Mooney, Elyse Villani, Rachael Haynes and Ellyse Perry out. 

"It's tough," Lanning said.

"Everyone is in contention so it is definitely going to be hard to get down to that final XI.

"The thing is we have a lot of different options and good variety," she said.

Lanning, who returned from shoulder surgery this Tour, came into the side to replace the retired vice-captain Alex Blackwell but even Blackwell didn’t feature in Australia’s T20I series against England at the end of 2017.

But Lanning didn't rule out changes being made to the squads throughout the series with an ICC Women's World Twenty20 later this year in the Caribbean, the team needing to determine the best XI. 

"The main thing over here is adapting," she said.

"The T20 format is so important for flexibility and making sure you are able to adapt to the situation of the game and the conditions.

"So we are very confident no matter who goes into bat or bowl will do a good job for us," Lanning said.

Australia face India from 10am today (3:30pm AEDT).