If you were to grade Jose Mourinho's season so far at Chelsea, you'd probably award him a C+ or a B- if feeling generous.
Many expected the Blues to come haring out of the blocks this season, inspired by the return of the Portuguese coach, but it's been a difficult start to life back in the Premier League for Mourinho.
Chelsea currently sit fourth in the Premier League table, four points behind league-leaders Arsenal, and will be looking to pick up their form after the international break.
However, if their problems persist, Chelsea should make a move for at least one of these five stars.
5. Stephan El Shaarawy | AC Milan
Widely considered one of Europe's most promising forward, Stephan El Shaarawy could leave AC Milan after a difficult start to the 2013/14 campaign.
The Italy international has been linked with a move to Stamford Bridge recently, and would reportedly cost around £25m, but that fee will seem like peanuts if the 21-year-old develops into a world star in the Premier League with the Blues.
4. Xabi Alonso | Real Madrid
Chelsea are at the stage where they need to bring in a replacement for Frank Lampard - and who better than the vastly-experienced Real Madrid midfielder Xabi Alonso?
The Spain international has class, Premier League experience and, best of all, he would cost very little because his contract expires at the end of the season.
3. Karim Benzema | Real Madrid
Chelsea's strikers have finally started scoring in recent weeks, but if the goals dry up again then Mourinho will seriously consider bringing in another out-and-out goalscorer.
The Portuguese worked closely with Karim Benzema at Real Madrid and knows how to get the most out of the France international.
The 25-year-old could step out of Cristiano Ronaldo's shadow and flourish in the Premier League.
2. Radamel Falcao | AS Monaco
Recent reports suggest that AS Monaco will consider selling star striker Radamel Falcao in January - but only if they receive a £60m offer.
The Colombia international would be prolific at Stamford Bridge, where he was previously linked with a move while scoring goals for fun at Atletico Madrid.
Arguably the best No. 9 in world football, Falcao could be devastating in west London.
1. Robert Lewandowski | Borussia Dortmund
Robert Lewandowski looks set to join Bayern Munich at the end of the season, but there's still a chance that a Premier League club could lure him to England.
So, why not Chelsea?
The 25-year-old would suit Mourinho's system perfectly and score plenty of goals as a result.
Stick Lewandowski into the Blues' current team and there's only one place you can imagine the Premier League trophy heading in May.
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