The 28-year-old defender had his season-long loan at Porto cut short last month by manager Remi Garde, who he previously played under during his time at French side Lyon.
Toumani Diagouraga has already linked up with Rangers boss Mark Warburton once in his career.
The 19-year-old completed his £3.75m move to the Foxes earlier this week.
The Middlesbrough winger has joined Leeds on loan, after a short spell at Huddersfield.
Sunderland are looking to strengthen in order to improve their Premier League survival chances.
The giant centre-back is being heavily linked with a move to Yorkshire this week.
The Aston Villa midfielder has joined the club on loan until the end of the season.
The Portuguese boss was sacked by Chelsea last month.
Ben Davies joined Tottenham Hotspur from Swansea City back in 2014.
Sheffield Wednesday boss Carlos Carvalhal has praised Barry Bannan.
Tottenham Hotspur fans would love to see some high quality additions to their squad this month.
The midfielder has been heavily linked with a Forest exit this month.
The Argentine has been linked with a move to White Hart Lane.
As it stands, West Bromwich Albion and Bournemouth appear the most likely destinations for the dazzling Frenchman.
Leeds United have been linked with the young winger but do they need him?
Norwich City stars are in demand.
Morgan Schneiderlin is set to leave Manchester United to join Everton in the near future.
West Ham United co-owners David Sullivan and David Gold lambasted by pundits after links to players from Sunderland, Celtic, Brentford and Hull City.
HITC Sport understands the Nottingham Forest player could soon undergo medical.
Could Newcastle United potentially make a move to sign Grimsby Town star Omar Bogle.
The trusting, often intimate, relationship between Bill Clinton and Tony Blair, including their shared remorse over the death of the Princess of Wales, is revealed in transcripts of conversations between the two leaders, under a freedom of information request.
Five former finance professionals, including a one-time Deutsche Bank manager, will go on trial next week for insider trading, almost six years after the U.K. markets regulator sent shock waves through London with a series of dawn raids and arrests.