Joel Robles is pushing Tim Howard for the number one spot at the club, according to Martinez.
HITC Sport understands the ex-Gibraltar boss is looking to get into club management.
Aston Villa take on Birmingham City in the Capital One Cup on Tuesday night.
The 28-year old has become a fan favourite at Ibrox.
Former Stoke City defender Danny Higginbotham has suggested that Burnley are more likely to make it to the Premier League than Derby County.
Leeds United's Under-21 side take on Brentford this afternoon.
David Gold has assured West Ham fans that their best players will not be sold in January.
Tottenham legend King has been impressed by Heung-Min Son’s start to life with Spurs.
Sunderland youngster Duncan Watmore scored a hat-trick for the club's development side at the weekend, but will reportedly not be involved against Manchester City.
The Magpies sit 19th in the Premier League standings after six games.