After another Champions League humiliation by minnows FC Basel, Jose Mourinho needs to act now.
Chelsea scraped through Group E thanks to Schalke's goalless draw on Wednesday night, and after ending the first-half with not a single shot on goal, it was quite embarrassing to say the least for the 2012 winners.
Another European medal doesn't look on the cards for Chelsea this year, unless the upcoming transfer window is played to perfection at Stamford Bridge.
We all thought Mourinho would bring instant success when he returned in the summer, and it's safe to say, as we approach Christmas, that this probably wasn't the start he was hoping for. Although, unlike Rafa Benitez before him, a blip in form won't rattle any nerves behind the scenes, with the board and fans alike, supposedly backing the Portuguese manager.
Even being extremely stubborn this season, through strangely benching the like of Juan Mata and David Luiz, Jose Mourinho will be the first to admit that some new additions to the squad will be vital, come the New Year.
Now, rumours are rumours, some far-fetched, but some are more realistic than others. With Chelsea's transfer priorities and funds in mind, let's take a look at who could seriously be brought in this January.
Could it finally be time for Hulk to move to the Bridge?
This transfer saga has been going on for what seems like eternity, and the rumours still aren't fading away. The Zenit powerhouse has been on top form in Russia so far, but with the World Cup back home approaching, the winter transfer window will be the Brazilian's last chance to make a move to a top football league.
Should Hulk decide to take the chance, it would be a risk. Arriving at Chelsea, with the countless number of attacking midfielders already fighting for places, both at club and country level, the 27-year-old would add to the overflowing list.
Also, valued at just under £40million by transfermarkt.co.uk, the Chelsea bought would be wary to risk another Torres-transfer.
Nevertheless, his size and physical attributes would fare well for Hulk, and he would prove to be a great buy for Chelsea, especially in the long-term.
Hulk's former teammate could save Chelsea, who currently find themselves in a striker dilemma, and will be on the look out for a goal machine in January.
The Colombian has been on leaps and bounds for FC Porto this season, sparking comparisons to countryman Radamel Falcao.
To fill those boots in Portugal take some doing, and after his move from the Mexican league, Martinez has been in flying form.
His potential transfer poses as another realistic signing for Chelsea, who's best bets will probably come from the less acclaimed leagues.
One down side is the £25 million price tag stuck on the striker, but for Chelsea this shouldn't be a problem.
The trend continues with another Porto player, Eliaquim Mangala.
If you haven't heard of him yet, you will soon, as the French international has been another standout player at centre-back this season.
A transfer to a bigger league might seem ideal for Mangala, who although didn't feature as part of the play-off comeback, as he will want to break into the World Cup squad before June.
Chelsea would benefit from an young centre-back, with pace and power, the 22-year-old would prove to be significant cover for John Terry, both starting and from the bench.
He is versatile, and can also play at left-back, deputised currently by Cesar Azpilicueta, who's naturally a right-sided full-back.
At £17.5 million, he could be a perfect replacement for Chelsea's ageing captain.
This transfer would be quite a surprise, as the Austrian is simply playing for the best team in Europe, regularly.
So it's not as such realistic, but a dream deal for Chelsea, as a replacement for 32-year-old Ashley Cole.
Saying this, a German website has rumoured the transfer, and it would be a sensational piece of business, if the Blues could strike a deal for the 21-year-old.
Alaba has been on the rise since breaking into the Bayern Munich first team, and his attacking prowess as a left-back would suit the Premier League.
Although, his country didn't make it to Brazil, which doesn't add to the few positives to join Chelsea, either way, if not now, a future attempt would be wise.
Diego Costa is another striker being linked to Chelsea is reportedly on Jose Mourinho's radar.
After the departure of Atletico Madrid's former goalscorer, Radamel Falcao, the newly pledged Spaniard immediately made the striker role his own.
With 14 goals in as many appearances in the league, Costa has been the standout player in La Liga, and probably the most surprising.
Not much was thought of the 25-year-old, as he was sent out on loan last season, but with Falcao gone, the striker returned to Madrid, and joins Jackson Martinez on Chelsea's forward wish list.
Atletico Madrid have been known for creating world-class players, who have moved to bigger clubs in the future, maybe Chelsea is the best destination for Costa, even after only breaking onto the world stage.
Once again, with a place on the plane to Brazil at stake, a move to the Premier League could secure Diego Costa's place, and for £22million, he would save Chelsea a few wads of cash, and possibly their season.
Do you think these signings would be realistic next month? Who would you buy?
Write for GiveMeSport! Sign-up to the GMS Writing Academy here: http://gms.to/1a2u3KU
DISCLAIMER: This article has been written by a member of the GiveMeSport Writing Academy and does not represent the views of GiveMeSport.com or SportsNewMedia. The views and opinions expressed are solely that of the author credited at the top of this article. GiveMeSport.com and SportsNewMedia do not take any responsibility for the content of its contributors.