The Republic of Ireland international is said to be disappointed at the lack of a new contract offer, encouraging interest from Manchester City and Tottenham.
Tottenham have been handed a possible boost in their reported interested in Everton midfielder James McCarthy after the Mirror reported that the former Hamilton man will not be offered a new contract in order to stave off interest in the player.
The 24-year-old has been a key player for the Toffees since arriving from Wigan in 2013, and has a wealth of experience under his belt for such a young player, having made 319 appearances already in his career.
With 177 of those matches in the Premier League, the Republic of Ireland international is said to be on the radar of both Tottenham and Manchester City according to the Mirror, two teams who are said to be interested in strengthening their central midfield departments ahead of the new season.
Everton will of course be reluctant to lose someone who has become a key man in Roberto Martinez's central midfield, but the Mirror say the Toffees have gone back on a promise to increase the player's salary to something that reflects his importance in the side, with new arrival Tom Cleverely earning more than the Glasgow-born man.
If Everton don't offer McCarthy a competitive wage, the player's relationship with the club could deteriorate.
Tottenham have seen Paulinho and Etienne Capoue leave this summer, while Benjamin Stambouli is reported to be on the cusp of a move to PSG according to the London Evening Standard.
With a lack of naturally defensive midfielder in their squad, the Mirror says Mauricio Pochettino has earmarked McCarthy as a target this summer. If the player becomes frustrated as a result of the wage structure at Goodison Park, that will only have made the chances of a move to Tottenham or Manchester City that bit more likely.