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.
West Ham United played host to Everton at the weekend.
Signed on loan, was Mo Barrow a terrible signing by Leeds United or purely a desperate one?
Garth Crooks praises Arsenal's Gabriel Paulista.
Aston Villa ran out as 1-0 winners over Birmingham City yesterday.
Manchester United striker has been linked with a return to Everton.
Nice midfielder Jean Michael Seri would cost a huge fee if Everton and Southampton want to bring him to England this summer.
Celtic have been linked with a loan move for another Manchester City prospect.
Palace chairman praises Liverpool supporters.
Leeds sold Lewis Cook to Bournemouth last summer.
Ibrox side Glasgow Rangers were beaten 2-0 by their rivals Celtic at Hampden Park yesterday.
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.