The spotlight may be focused on Didier Drogba's return to Stamford Bridge, however Chelsea should not be easily distracted as there's another player who threatens to cause an upset On Tuesday night - Burak Yilmaz.
It's excusable to talk about the danger that Drogba possesses especially given his high number of achievements and accolades, but Yilmaz is too a considerable threat and Jose Mourinho will hope that he's not wearing his prolific shooting boots in the clash at Stamford Bridge.
Yilmaz has a prolific scoring record for Galatasaray and it speaks for itself with a blistering total of 37 league goals in 54 appearances for the Turkish side, who are currently second in the Turkish Super Lig.
The Turkish forward should be a worry for Chelsea, but before making his transfer to the Turkish giants the 33-time capped striker wasn't making many headlines nor were there many clubs scrambling for his signature.
Prior to Galatasaray he had a two-year spell with Besiktas from 2006, where he scored only 9 times in 42 appearance, raising suggestions that he could not quite cut it at a top Turkish side.
A spell at Maniasaspor following in 2008 where he improved, hitting 11 goals in just 18 outings, which attracted the interest of another Turkish super club Fenerbahce. Again he failed to impress and only managed to play six matches without scoring a single goal.
Perhaps his last chance to prove he could fulfil his potential was when he headed for Trabzonspor in 2010 and thankful for him he rediscovered his hot goal-scoring form.
In his two years at the club he helped them finish runner-up in the league in 2010-11. Sensing they could have a real goal-scoring handful at their disposal, Galatasaray snapped him up in 2012 on a four-year deal fora mere €5million - ever since he has been one of Europe's most lethal strikers. In the 2012-13 Champions League group stage, he topped the charts along with Real Madrid's Cristiano Ronaldo having scored a total of six goals, three of which made up a perfect hat-trick in a 3-1 win over CFR Cluj.
What makes Yilmaz such a threat is his ability to score a variety of goals; he's a tall, athletic player with plenty of strength, therefore he clearly poses an aerial threat.
Furthermore, he has fantastic technique and his creative mind allows for space to be created for his teammates in and around the box, which could play into the hands of Drogba, his striking partner, very nicely as he, too, is a clinical finisher.
Set-pieces are also a feature of Yilmaz's game, with the ability to score free-kicks - so Chelsea should have their work cut out in the highly-anticipated Champions League clash and must not forget that not only do they need to worry about Drogba, but there is a less familiar foe who could crush their European dreams.