The January transfer window can come as a blessing to many teams as it gives them the opportunity to strengthen amid times of need.
However, it can also be a curse, especially if your club loses its most influential player mid-season.
Each team in the top flight has at least one indispensable star the fans cannot bare to see go.
He may not be the most talented player within the squad, but he would certainly leave the biggest whole once gone.
Starsport looks at the one player each Premier League club cannot afford to see sold in before the window shuts.
Arsenal – Pierre-Emerick Aubameyang
With 15 goals to his name in all competitions, only one Arsenal player can boast having either half that figure this season – Gabriel Martinelli.
The skipper has even been linked with a move away to Inter Milan this month as his contract continues to run down.
While Mikel Arteta is in the transition process and trying to get the best out of his team, he desperately needs Aubameyang’s quality and potency to keep shining through in their bid for a top-four finish.
Aston Villa – Jack Grealish
Jack Grealish is attracting interest from Manchester United
This has become all the more obvious an answer off the back of season-ending injuries to No.1 goalkeeper Tom Heaton and sole striker Wesley.
While John McGinn has been nothing short of a sensation for Villa, his recent absence and Grealish’s crucial contributions in attack alongside his leadership and importance to supporters makes him truly indispensable.
Villa would be wise to tell Manchester United there is no use enquiring while their Premier League status is on the line.
Bournemouth – Nathan Ake
Nathan Ake has a host of admirers with the January transfer window now open
Eddie Howe’s side are in free fall, and it’s no coincidence that drop in form has coincided with the loss off Ake to injury.
The centre-half has been a revelation at the back for Bournemouth…