The attack bowler, Siddle looked physically spent on day five of the second Test, bowling a total of 64 overs during the five days.
"I think every Test match is hard, I don’t think it’s just that one day, but yeah it was defiantly hard work and that’s Test match cricket, it’s always tough times and hard moments," he said.
It’s going tocome around more often than not and I’ve just got to be prepared."
Siddle explained that he would usually have a day off the day before a Test match started but because of his heavy workload and short turnaround between matches, the majority of his preparation will be completed Thursday.
‘I’ll usually have the day of before the game but I’ll use tomorrow as my day of preparation with bat and ball and get some catches out in the field and prepare that way’, Siddle said.
‘I’m feeling fit, confident and looking forward to having a trundle tomorrow’.
‘It’ll be nice and light today for me, just take it easy and have another rest day and just try let the body recover as much as possible, I’ll do a bit of weights this afternoon and a bit of rehab and go from there’.
Despite the awkward preparation for the series deciding Test, Siddle said that he felt confident he will be fresh and ready Friday morning for the start of play.
‘I’m feeling good now," Siddle said.
"I’ve recovered well and done everything straight after the game with everything I need to get done and get out of the way.
"The last couple of days I'll just take it easy and get ready tomorrow and prepare.
"I’m feeling good, I’ve had plenty of sleep and I’m feeling alright which is nice’.
‘I’m in a good position at the moment, the bodies feeling fine and I’m ready to go’.
‘I’m always pretty diligent with what I have to do after games and what I need to do to prepare for the next match, with recovery straight after with ice baths, extra fluids and obviously sleep is a big.
‘"I woke up this morning feeling well. I’ve spent a bit more time in between with a bit of massage and physio and no doubt I’ll be ready tomorrow for a run around and a bit of a bowl and ready for the next day’.
"I got plenty of sleep in and got to the beach yesterday, which was nice. It’s always nice to get out in the ocean in Perth’.
Australia have brought Mitchell Johnson back to bolster their bowling stocks for his home Test at the WACA Ground after James Pattinson succumbed to a side strain at Adelaide.
Left-arm paceman Mitchell Starc also stays in the squad after he carried the drinks as 12th man in the first two drawn Tests.
While the uncapped John Hastings and Josh Hazlewood will join Johnson as cover for Siddle and Hilfenhaus - who bowled more than 117 overs between them in Adelaide.
Siddle was excited about the three new additions to the squad, epically former Test teammate Johnson and Victorian teammate Hastings.
‘Yeah it is good to have Mitch back," Siddle said.
"We’ve spent a lot of time together and played a lot of cricket together so it’s nice to have him around the group.
"Obviously his Shield season, it has been a great start for him; he’s been going well for WA. And obviously my Victorian teammate John Hastings.
"It’s nice to have him around as well and young Josh Hazelwood around the group again, it’s a good group of guys around the team."
Siddle admitted he had no idea which quick would play or the final make-up of the Test side to face South Africa.
Siddle also said he was unfussed with the unusual greenish top of the WACA pitch.