Despite a strong start to the season with an unbeaten run of 22 games in all competitions, Arsenal have been losing some of their steam in recent weeks.
The transfer window is a great opportunity for clubs to make some squad changes in order to rejuvenate their season, but clubs statistically end up making more mistakes than bingos.
The Gunners have made some shocking signings down the years in the Premier League, and we take a look at some of the worst.
6. Andre Santos
The Brazilian was signed for £7m from Fenerbahce in 2011 to try and counteract the lack of natural left-backs at the club.
Despite popping up with three goals, his tenure at Arsenal was characterised by a lack of positioning and generally lethargic defensive performances.
His worst moment in an Arsenal shirt came when he swapped shirts with former Arsenal man Robin van Persie at half-time, after the Dutchman had scored against him. And yes, Van Persie was playing for Man Utd at the time.
Ivorian Gervinho arrived at the club for £10m in 2011, with a decent pedigree, leading Lille to the French title in a team including Eden Hazard.
He was originally signed as a direct replacement for Samir Nasri but never lived up to his transfer fee. His worst, and most memorable Arsenal moment was a dreadful open-goal miss against Bradford in the League Cup. After 11 goals in 69 appearances, the striker was shipped off to Roma.
4. Sebastien Squillaci
Squillaci was a 2010 signing who arrived with a good reputation, being a French international who had just finished two impressive seasons with Sevilla, and was signed for £4m.
He was brought on to try and shore up a leaky Arsenal defence but quickly became known for his clumsy and error-strewn performances in the league before only being trusted by Arsene Wenger in cup competitions.
He made 23 appearances in three forgettable years before leaving for Bastia in 2013.
3. Park Chu-Young
Another 2011 panic-buy following the 8-2 drubbing by Manchester United, the South Korean arrived from France as a highly-rated striker, even walking out of a Lille medical to sign for the Gunners.
After agreeing a fee of £4m, the striker got off to the best possible start, scoring in his League Cup debut against Bolton. However it only got worse form there. Doubts about form and fitness meant he only made six substitute appearance before leaving on loan to Celta Vigo and then Watford.
2. Marouane Chamakh
The Moroccan arrived at the club on a free transfer from Bordeaux in 2010, and actually had the most impressive start, scoring 11 goals in his first 22 appearances. He even scored the fastest goal in the Gunners’ history, after 37 seconds against Wolves.
The return of talismanic striker Van Persie from injury completely derailed the striker’s run of games and confidence, and he was frozen out. He finished with 14 goals in 67 games before going to West Ham on loan in 2013.
1. Francis Jeffers
Jeffers arrived in north London to great fanfare, an £8m signing from Everton in 2001. Upon arrival Arsene Wenger described him as the “fox in the box” that Arsenal needed.
Unfortunately many question marks came up after his signing. Injuries, reports of an attitude problem, and the emergence of Thierry Henry and Sylvain Wiltord as Wenger’s preferred options means Jeffers never lived up to the potential.
He scored just eight goals in his three seasons at the club, before moving to Charlton Athletic in 2004.