Adelaide forward Mitch McGovern will miss the next two months of the AFL season because of an ankle injury.
The high-flyer was hurt when he collided with teammate Richard Douglas in the last minute of the Crows' five-point loss on Saturday night to Port Adelaide.
McGovern was initially treated for a head knock, but then reported ankle soreness.
Adelaide's high performance manager Matt Hass says McGovern has an ankle sprain.
"We have decided to take conservative measures at the moment," Hass told the club's website.
"We'll see how he presents over time and rehab him accordingly ... luckily, no surgery required at this point."
Adelaide captain Taylor Walker remains in doubt for Friday night's home game against the Western Bulldogs as his injury-troubled season continues.
Walker missed the season-opener because of a foot injury and the round-seven match because of hamstring soreness.
On return last Saturday against Port, Walker left the field with tightness in a glute muscle but played out the game.
The key forward said he would have to prove his fitness to face the Dogs at training on Wednesday.
"My back and glute have been causing me a bit of stiffness and referred pain," he told Triple M radio on Tuesday.
"I will have to get through the main session tomorrow."
Ruckman Sam Jacobs was expected to front against the Bulldogs after suffering back spasms in the Power loss.
But Jacobs could yet miss the fixture as his wife is due to give birth this week.
The Crows rejected reports midfielder Brad Crouch, who hasn't played this year because of groin injury, needs season-ending surgery.
"There is absolutely no surgery required," Hass said.
"It's just a slow and steady build-up for Brad to make sure he ticks a few important boxes before he really starts to build up his training load and we expect to see him later on in the year."
The Crows have 14 players on their injured list but Hass says five - Riley Knight, Alex Keath, Sam Gibson, Kyle Hartigan and Curtly Hampton - might return to action this weekend.