Arsenal manager Arsene Wenger has admitted his concern about the Gunners’ battle for Champions League qualification.
The north-London side are seven points off fourth place, although they have a chance to shorten that gap if they beat West Ham on Wednesday night.
Wenger, who has guided his team to 15 consecutive top-four finishes, admits he is frustrated at his team's plight.
"What is worrying is just that we do not win the big games," said Wenger, who watched his team lose 2-1 at Chelsea on Sunday.
"At the moment we do not get the results we want.
"The difference in points mathematically is not dramatic, but the consistency of our performances within games is what is worrying."
"The consistency of our performances within games is what is worrying" - Arsene Wenger
Wenger confirmed he intends to boost his squad with two new signings before the transfer window shuts, and professed his admiration for West Ham midfielder Mohamed Diame.
The Frenchman refused, however, to reveal whether he was interested in signing France midfielder Yoann Gourcuff.
"I don't give you any names. I don't come out on [rumours Lyon have offered him to Arsenal] because it would put Lyon in a bad position," Wenger said.
"You have to respect the player as well has a contract somewhere, is playing and, as long as the transfer is not done, for anybody it is best not to talk about it because it doesn't work. He has to continue to play there where he is."
Arsenal v West Ham (Wed, 19.45) team news
Alex Oxlade-Chamberlain and Lukas Podolski are available.
Wenger has a problem in midfield as Mikel Arteta (calf), Francis Coquelin (hamstring), and Tomas Rosicky (calf) are all out.
Defensive midfielder Abou Diaby (thigh) will have a test, but forward Gervinho is away at the African Nations Cup and goalkeeper Lukasz Fabianski out with a foot injury.
Provisional squad: Szczesny, Gibbs, Vermaelen, Mertesacker, Sagna, Cazorla, Diaby, Walcott, Wilshere, Giroud, Mannone, Koscielny, Ramsey, Podolski, Oxlade-Chamberlain, Santos, Arshavin, Jenkinson.
West Ham have no fresh injury concerns.
Andy Carroll and George McCartney (both knee) miss the game originally scheduled for 26 December, while James Collins (hamstring) is also expected to miss out.
Marouane Chamakh is ineligible to face his parent club, while Mali forward Modibo Maiga is away at the African Nations Cup.
New signing Wellington Paulista will need more time before being included.
Provisional squad: Jaaskelainen, Spiegel, Reid, Tomkins, O'Brien, Demel, Potts, Nolan, Jarvis, J Cole, Noble, Diame, O'Neil, Collison, Taylor, Diarra, C Cole, Vaz Te.