Aston Villa's Philippe Senderos
Rangers are waiting for a response from Swiss defender Philippe Senderos as they look to strengthen their squad.
The Times report Rangers have offered a contract to the centre-back, who is giving the offer 'serious consideration' after being impressed by Mark Warburton during discussions.
Senderos is a free agent after a spell with Swiss side Grasshoppers, who he signed with on a six month deal in January after being released by Aston Villa.
The 31-year-old did not make Switzerland's Euro 2016 squad but has more than 50 caps for his country and featured at the 2010 and 2014 World Cups.
Stoke's Glenn Whelan and Philippe Senderos (L) of Fulham in action
He began his career with Servette before signing with Arsenal in 2003 and being hailed as the 'next Tony Adams', but never lived up to his potential at the Gunners and was sold in 2010.
Senderos has also had spells at AC Milan, Everton and Fulham.
Rangers' move for Senderos is a sign that their hopes of re-signing Tottenham's Dominic Ball are fading, as they seek to strengthen their defence ahead of the league season, which kicks off this weekend.