Leonardo Bonucci has suffered an ankle injury, Serie A champions Juventus have confirmed.
The defender started Sunday's 2-1 win at Lazio but had to be replaced before half-time, having tried to play on after being hurt early in the game.
Juve announced in a medical update on Monday that Bonucci has sprained his right ankle and reports have claimed he could be out of action for as long as a month.
The Italy international may therefore be a doubt for the first leg of Juve's last-16 Champions League tie with Atletico Madrid on February 20. The second leg will be held in Turin on March 12.
Bonucci is one of Juve's key players, the 31-year-old starting 17 games in Serie A this term, with Massimiliano Allegri's men seeking to clinch an eighth consecutive title.
Juve's win at Lazio, sealed by a late Cristiano Ronaldo penalty, saw them move 11 points clear of Napoli at the top of the table.
How did you celebrate last night's win at the Olimpico?
Gallery https://t.co/f8nLdKtum4#LazioJuve#ForzaJuvepic.twitter.com/aQLo0j0Z4a— JuventusFC (@juventusfcen) January 28, 2019
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