The 29-year-old has already been the subject of numerous bids this window.
Mason is currently recovering in hospital after suffering a skull fracture.
Alexis Sanchez's 98th-minute penalty seals a controversial fifth straight home win for the Gunners.
Arsenal won the reverse fixture in controversial fashion.
Scotland international has been Hull's best player this season.
Manchester City midfielder was sent off for a two-footed challenge on Johann Berg Gudmundsson.
Flanagan has started just three times for the Clarets this season.
Joey Barton served a one-game suspension against Manchester City.
Fernandinho received third red card in six games in all competitions.
Jurgen Klopp's side can move to within three points of leaders Chelsea.
Will Joey Barton be followed by further additions as the Clarets stave off relegation from the Premier League?
Manchester City want to bounce back from their defeat against Liverpool.
Tottenham come into this game on the back of a 3-0 win over Hull.
Burnley and Manchester City face each other in the Premier League on Saturday.
The England international is eyeing a Europa League place with the Clarets this term.
Keane joined Burnley on a permanent transfer in January 2015.
Michael Keane, 23, has impressed playing for Burnley this season.
Jose Mourinho is already facing a charge for his comments over referee Anthony Taylor.
Neville says United could have scored 'six, seven or eight' goals at Old Trafford.
United could not find a way past Tom Heaton.
Manchester United and Burnley face each other in the league clash on Saturday.
Defour has not played since injuring his hamstring against Southampton on 16 October.