Here's our picks..
A superb start. The first Blues loanee to make the side will surely be gracing the Chelsea first team in seasons to come, or that of any other club that manages to prise him away from Stamford Bridge. Never mind competing in the Premier League, 21-year-old goalkeeper Courtois is currently helping Atletico Madrid contest a three-way battle for the La Liga title in Spain.
At left-back, meanwhile, Chelsea would only need to call on a man who has experience of a Champions League final in Bertrand. Though it hasn't quite worked out for the 24-year-old in west London since, Bertrand has impressed since moving on loan to Aston Villa and, were it not for the form of Cesar "Dave" Azpilicueta this term, could well have found himself in the mix in Jose Mourinho's side.
Chelsea's deadline-day signing this January, Zouma was so highly sought by the Blues that the Special One even put in a personal phone-call to the 19-year-old ahead of his move. And with the Frenchman at such a young age - and John Terry at the exact opposite end of his career - it won't be too long before we see the centre-back in regular action on these shores.
A product of Barcelona's famed La Masia academy, defensive midfielder Romeu has already amassed significant Premier League experience at Chelsea. And so versatile is the Spaniard that he can also play at centre-back, which is where he makes it in this starting line-up. The 22-year-old is currently on loan at Valencia, where he is playing a big part in the Spanish club's season.
Signed from Fluminese last campaign, Brazilian right-back Wallace's potential is such that loaning the 19-year-old out to a Championship side just wouldn't do. Instead, the defender joined Inter Milan this term, though he has only made a handful of appearances. If match-readiness is a worry, though, you need only look to Todd Kane, who has been a regular for Blackburn Rovers this season.
Midfield is where things get complicated for any Chelsea side, as there is simply so much talent to choose from. On the left, however, the younger Hazard brother is a fine choice, with the Zulte Waregem midfielder having scored nine goals in 25 domestic games this season. Predominately a central attacking midfielder, Hazard can also play down the left, where he has scored for Zulte in the Europa League.
Another versatile midfielder, Marin takes up a place in central midfield, where the Sevilla man has notched three assists so far this season. The German has also registered an assist playing up front for the Spanish side and is similarly capably of playing on either flank. Marin almost made a permanent first-team breakthrough under Rafa Benitez last season, though his time is likely to come in the years ahead if he takes his chances to impress Mourinho.
With 12 appearances and one goal for Vitesse so far this season, Kakuta just about edges into this XI based on his form and potential. In reality, though, the likes of Josh McEachran, Bertrand Traore and Nathaniel Chalobah all have equally good shouts for a central midfield berth. It's safe to say, then, that a Chelsea loanee side could also field a pretty decent bench.
An easy choice out wide, meanwhile, is Liverpool's Moses, who has made regular appearances for Brendan Rodgers' side, also netting against Bournemouth in the FA Cup. The 23-year-old has had a mixed season at Anfield but has still demonstrated his quality for the Reds, as well as during his time at Chelsea last term - and especially his years at Wigan Athletic.
A striker of such quality that he would probably captain this side (either him or shot stopper Courtois), Lukaku is a shoe-in at centre-forward. Injury has halted the Belgian recently but, with nine goals and four assists to his name during his loan spell at Everton, Lukaku is virtually guaranteed a bright future at Chelsea. It just seems a matter of time before he is ready to take up the mantle at Stamford Bridge.
Yet another tough decision, with a host of names unlucky to miss out - notably Derby's Patrick Bamford. Nevertheless, Piazon adds plenty to any side, having scored 11 goals and made eight assists for Vitesse this campaign. The 20-year-old striker clearly has a bright future - but, then again, so do the five others Blues on loan at the same club...
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