Once expected to be among the busiest clubs in the January transfer window, Arsenal disappointed with a quiet month and will regret that they didn't make these moves moving forward.
Now that it's February, the Gunners have squandered their chance to improve their club heading into Champions League play and risk finishing outside the top four (they currently sit at sixth place). They face Bayern Munich in the Champions League knockout stage, and they'll be hard-pressed to defeat the German giants without any major improvements in the last month.
Though it seemed every day that a different big name was in the rumor mill, with Arsenal as a likely suitor, the only decent acquisition they made was left back Nacho Monreal from Malaga.
Let's take a look at moves the Gunners will wish they had made moving forward through the rest of this season and beyond.
Mohamed Diame, West Ham
Arsenal have run into trouble with injuries in their midfield, and Mohamed Diame from West Ham would've been a great get to add depth and ability to the position.
The Independent reported Arsenal and Tottenham as suitors for Diame, but he ended up staying put with West Ham.
The Gunners' biggest need was at striker and left back, but they certainly could've used Diame to shore up some midfield problems with Mikel Arteta getting the injury bug and Abou Diaby always prone to missing time.
Arsenal will regret not acting on Diame and spending the cash to add an able midfielder to their roster.
David Villa, Barcelona
Even Arsene Wenger knows he missed out on this deal.
The Arsenal boss told Mirror that he was oh so close to a deadline day move that would've brought the Spanish international to the Premier League, but couldn't get it done. He also revealed they'll continue looking his way down the road.
Unfortunately for the Gunners, Villa's time is running out. He's 31, and is becoming less effective by the day.
Bringing in Villa past his prime could still reap benefits, but he can't be too far past his prime. They want to get as much as possible out of Villa's dwindling career, and they couldn't afford to miss out on him only to bring him in in six or seven months.
Adrian Lopez, Atletico Madrid
Adrian Lopez's iffy season scared away many potential suitors, likely including Arsenal, but he still would have excelled in the Gunners' system.
Adrian was reported by Mirror to have the interest of Arsenal, but his £14 million buyout clause scared off Wenger's side.
But his decisiveness and passing skill to make big-time plays would've helped Arsenal in those tight matches where they cannot find the goal. He's also versatile and able to play in any forward position.
If there's one thing Arsenal could use in their attacking line, it's versatility and play-making ability. Adrian has both of these traits and would've been worth the steep price.
Who do you think Arsenal should've brought in? Hit me up on Twitter.