Aston Villa are struggling to tie down Ron Vlaar and Fabian Delph with both threatening to leave on a free transfer in the summer, reports the Sunday People.
Both men have been key players in Paul Lambert's team so far this season and have subsequently been linked with bigger clubs. Manchester United are believed to be chasing Vlaar while Arsenal, Liverpool and Tottenham are monitoring Delph's situation.
The same report claims that neither player is satisfied with the progress being made at Villa Park and are considering the possibility of of running down their contracts, which both expire in the summer.
Manchester United for Vlaar
Vlaar thoroughly impressed for the Netherlands during this summer's World Cup, helping them to a third place finish. His form attracted the interest of Manchester United boss Louis van Gaal, who was managing the Dutch national team during the campaign.
As Sunday's Manchester derby demonstrated, Manchester United have been desperately short at the back. Michael Carrick and Paddy McNair were the makeshift centre-back pairing after Chris Smalling was sent off and Marcos Rojo dislocated his shoulder.
- Arsenal interested in signing Fabian Delph
- Vlaar agrees personal terms with Manchester United
- Arsenal could hijack Manchester United move for Vlaar
Delph to Arsenal
Similarly, Delph has been linked with a move to the Gunners because of a lack of options in midfield. The 24-year-old has impressed this season and has recently broken into Roy Hodgson's England side as a result.
He was seen as a potential alternative to either Mathieu Flamini of Mikel Arteta. However, competition from Liverpool and Tottenham means coaxing Delph to the Emirates will not be plain sailing.
It also remains a fact that Villa could choose to cash in on the players in the January transfer window, or take the risk and continue to try to tie them down to long-term contracts. However, unless significant progress is made under Lambert, it is hard to see them rejecting the chance to join a top six Premier League club.