Daniel Rich will miss the Brisbane Lions' first home game for the 2018 season, after scans today revealed he has ruptured a ligament at the front of his left ankle.

Rich was injured in the first quarter of the Lions season opener against St Kilda on Saturday night and did not return to the field for the remainder of the match.

The 27-year-old will not require surgery, but he will miss Round 2 against the Melbourne Demons at the Gabba.

He will be assessed on a week by week basis.