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.
Arsenal are currently second in the Premier League table.
Chelsea overcame Leicester City in impressive fashion this weekend.
Arsenal overcame Bob Bradley's Swansea City side this weekend.
Mark Warburton’s Glasgow Rangers suffered a heavy defeat to Celtic in the Scottish Premiership in September.
The 27-year-old did not celebrate against Tottenham Hotspur on Saturday.
Tottenham Hotspur failed to win against West Bromwich Albion in the Premier League on Saturday.
The former Championship boss believes that Leeds could sneak into the top six.
West Ham United's summer signings have looked poor so far.
Tottenham Hotspur may have to make a key change in the heart of their defence.
The former Liverpool man was part of Koeman's coaching staff at Southampton.
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.