Injured Australian fast bowler Peter Siddle says a heavy playing schedule is now part and parcel of being an international cricketer and can not be totally to blamed for the recent injury crisis to hit the Australian side.

Siddle arrived in Melbourne this morning after injuring his back during Australia's one-day series against India.

Australia has experienced a horrid run of injuries on the sub continent, with all-rounder Moises Henriques becoming the fifth player to be forced home overnight.

The pair will be replaced by New South Wales paceman Burt Cockley and Victorian all-rounder Andrew McDonald with the seven-match series level at 2-2.

Siddle admitted the Aussies have probably played too much cricket in the last 18 months, but says the team simply has to accept the calendar in front of it.

"It's always going to be a lot of games and a lot of cricket played, that's what the spectators want to see and that's our job," he said.

"It's every day and you got to put in the hard work and that's just one of the things.

"Obviously this last 18 months has been our tough sort of period and no doubt after once we finish up in another six months' time it'll ease up a little bit and there will be less cricket.

"But at the moment we just got to work at it and just keep working through it."

Despite Siddle and Henriques joining Brett Lee, James Hopes and Tim Paine in the casualty ward, Siddle says the mental exhaustion takes the biggest toll.

"Being away from family and friends and doing the normal stuff you do when you are back home," he said.

"You are always changing hotels, different sceneries and living out of a suitcase."

Siddle's Victorian team-mate McDonald says he is looking forward to making a return to the international scene in India.

"I probably wasn't expecting to be called up to this one-day team when I was in India for the Champions League," he said.

"So it's a nice surprise, but it's a little bit disappointing for those guys who have unfortunately come down with an injury."