The striker, 32, will quit Ibrox after persistent knee problems robbed him of one final season with the Glasgow giants.

The Croatian had hoped to play on at a less demanding level elsewhere, perhaps in the Far East or the United States, but says he is now likely to hang up his playing boots for good.

The fans' favourite was denied the opportunity to go out on a high when an ankle ligament injury sustained in training on Friday meant he was unable to play in the final home game of the season yesterday, which Rangers lost 1-0 to Kilmarnock.

Instead Prso - along with Stefan Klos and Gavin Rae, who also leaves Rangers in the summer - hobbled on to the Ibrox pitch with the help of crutches after the Bank of Scotland Premier League clash.

And a clearly emotional Prso said: "At this moment it looks as though I will leave football altogether.

"You can never say never and maybe I will go somewhere else for something a bit easier.

"In terms of playing at the top, it's over, and at this moment in time it will probably be over for good."

Whatever his own future holds Prso predicts better times ahead for Rangers next season under the guidance of Walter Smith.

A 1-0 reverse to Killie - the result of a Steven Naismith goal - brought Smith's unbeaten domestic run to an end since he returned to the Ibrox helm in January.

Prso said: "Walter is the right man, along with Ally McCoist. I think there can be great moments here next season. I think something good will happen."

Asked whether he wished he could have worked with Smith for longer, the striker added: "You must be true to everyone and for me it's time to say goodbye.

"I leave here with a lot of good memories. It's hard for me to pick just one but I will always remember when we won the championship on the last day of the season in my first year here.

"When you have all these people behind you it's impossible not to feel something. Maybe you need to be a player to really understand what I'm talking about."

Kilmarnock boss Jim Jefferies paid tribute to Prso, saying: "I'm not delighted he is injured but I was delighted he wasn't playing against us.

"He's a very intelligent player of great strength and awareness.

"I was pleased when I saw he was not on the team sheet but I wish him all the best for the future."