To see a tribute to Popa...

Sydney FC have called a press conference for a "significant" and "major" announcement at 12.30pm today.

It is understood Popa will confirm he is quitting the game after a run of niggling injuries recently.

John Kosmina questioned the towering defender's fitness after this weekend's game against Wellington Phoenix, saying the star had said he was fit but wasn't.

The decision comes after Sydney FC chairman Andrew Kemeny told players to either stand up and be counted or move on after the defeat against Wellington Phoenix on Friday.

The 35 year old joined Sydney at the start of last season under Branko Culina, returning from an overseas career where he spent four years in Japan at Sanfrecce Hiroshima and five years at Crystal Palace.

The towering defender notched up 58 caps for the 'Roos and scored eight goals for the national team - including one against Paraguay in literally his final minute as a Socceroo - before retiring after the World Cup.

Popa has recently been playing a larger part in coaching at the club and may stay on in that role.

It's not yet known who will take over the skipper's armband at the club.

We'll be at the press conference and covering it live here on 442TV (all going well...!)

To see a tribute to Popa...