Warnock never worked for the Leeds United owner, but spent a year at Elland Road prior to his arrival.
Mane has been linked with a number of Premier League rivals.
Rangers are waiting to hear whether Dominic Ball can return to Ibrox.
Sissoko seems intent on leaving Newcastle United following their relegation to the Championship.
Manchester United have confirmed the signing of defender Eric Bailly.
The former Liverpool boss was confirmed as the new Celtic manager last month.
Jurgen Klinsmann's side bounced back from last week's 2-0 loss to Colombia to win their second Copa America Centenario group game 4-0 at Soldier Field in Chicago.
The left-back was the star of the season for the Championship side.
He has however admitted that the Dutch international striker could leave.
Ray Parlour has suggested that Southampton should look at Frank De Boer or David Moyes, who were both linked with Everton.
Lex Immers has claimed that he snubbed Celtic in order to join Club Brugge.
Middlesbrough and Newcastle United are said to be keen on the winger, who has struggled to make an impression at Crystal Palace.
And 2017 looks to have got off to a decent start.
HITC Sport understands a bid is imminent from Premier League outfit
Leeds United have had a closer look at three potential new players.
Newcastle United are believed to be interested in signing Crystal Palace winger Andros Townsend.
A report suggests Wolverhampton Wanderers have joined Queens Park Rangers in the race to sign the Everton striker.
Everton should consider a move for Aston Villa's reportedly available forward.
Hourihane is said to be at the centre of a tug-of-war between Sheffield Wednesday and Aston Villa.
Liverpool and Manchester United went head-to-head at the weekend.