David Warner failed to take field against India in the ongoing Boxing Day cricket Test after the Australian opener suffered a nasty blow on his right forearm at the MCG nets.
Siddle took the field as Warner's replacement.
"David Warner was hit in the right forearm during this morning's net session," a Cricket Australia spokesperson said.
"He has significant bruising which is limiting his ability to field at the moment."
Warner, who scored a duck in the Australian first innings before the hosts posted 530, is the fourth Australian player to be injured in the MCG nets this week.
On Tuesday, Shane Watson and Mitchell Starc both left training early after being struck in the nets. Watson was hit on the helmet, while Starc edged a ball onto the inside of his knee.
The following morning, Shaun Marsh was struck on the left thumb and required treatment before he continued his session.
The problems in the MCG nets come after the Indian pair of Shikhar Dhawan and Virat Kohli got hit in the Gabba nets before play on the fourth day of the second Test and subsequently the visitors complained about the practice pitches on offer.
Speaking on Wednesday, Warner had defended the practice pitches saying the minor injuries were a part and parcel of the game.
It is yet to be confirmed whether or not Warner will bat again in this match.
Image: David Warner bats
Photograph: Morne de Klerk/Getty Images
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