Warburton has left his role at Ibrox and the Rangers legend is not displeased.
The Glasgow Rangers' Ibrox man has praised the Celtic star's decision.
Ibrox side Rangers lost to Hibernian in the final of the Scottish Cup at the weekend.
The former Rangers hero was discussing the club's ability to lure players in their prime.
Ibrox side Rangers will take on Hibernian in the final of the Scottish Cup this coming weekend.
Ibrox side Rangers will face Hibernian in the final of the Scottish Cup next month.
Ally McCoist receives the most credit for Rangers' nine successive league titles, but the Glasgow giants also needed an influential leader at the back.
Ibrox outfit Rangers will take on Old Firm rivals Celtic in the semi-finals of the Scottish Cup next month.
Rangers striker Martyn Waghorn has been linked with Sheffield Wednesday and Reading in the January transfer window.
Richard Gough has raved about Rangers playmaker Jason Holt.