Vidmar will hang up his boots when the Central Coast Mariners sign off for the season after the A-League Grand Final at the Sydney Football Stadium on Sunday week.

"There has been a lot of speculation on what I was going to do, whether to continue on or to end my career," said Vidmar.

"I made up my mind about three weeks ago and thought that it was probably the right time to finish and that was well before we clinched our Grand Final berth.

"My aim at the start of the season was to help qualify the team for the AFC Champions League and to top that now would be very difficult.

"There are a lot of people that I'd like to thank - when I first started in the National Soccer League my first coach Zoran Matic was a huge influence for my career and every other coach that I've had since has influenced me in some way.

"I'd like to thank everyone at the Mariners - everyone in the office to the coaching staff and my team-mates, after what happened with my medical condition it was a gamble that they took to bring me here and I'd like to thank them for giving me the opportunity to finish my career in Australia, it would definitely be nice to finish it off with a Championship."