Sergio Floccari has suffered an ankle injury during a charity basketball match last night involving players from both Lazio and Roma.
The 29-year-old will undergo a series of tests this morning to ascertain the severity of the damage.
Floccari appeared to turn his left ankle just a few minutes into the match in aid of the UN World Food Programme.
It remains to be seen whether he will miss Lazio's last remaining game of 2010 against Udinese at the Olimpico this weekend.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's tipster competition - £5,000 monthly.