Melbourne Victory are again holding their breath after midfielder Billy Celeski went down at training today.

The 25-year old had a full knee reconstruction last season and was returning to good form and full fitness after the opening two A-League matches but there are fresh fears over his injury after he clutched his knee after twisting it at Olympic Park this morning.

Celeski will have his knee examined as soon as possible but it is unsure just how bad the damage is at this stage.