Andre Villas-Boas has compared Fernando Torres' plight in-front of goal to that of former Blue Andriy Shevchenko.
The Spanish international hasn't scored since October, a 21-game stretch that has been typical of his short spell at Stamford Bridge.
"We have been through the Torres situation before with Shevchenko and Kezman," Villas-Boas told Portuguese radio station TSF.
"We continue to work on his motivation, his specific movements on the field and his trust. There is only one atmosphere which will make him regain his trust, and that is a competitive atmosphere."
With Villas-Boas having highlighted Chelsea's littered transfer history, GMF has decided to take a look at the 10 worst signings made by the club in the Premier League era...
10. Emerson Thome 1999-2000
The Brazilian spent just eight months with Chelsea after an undistinguished spell with Sheffield Wednesday. Bereft of pace, and a place in the team, he departed after playing just once in his second season at the club.
9. Brian Laudrup 1998-1999
The Danish legend came with a big reputation having played for Bayern Munich and AC Milan, but his best days were firmly behind him by the time he joined The Blues as an injury ravaged tenure saw him play just seven times.
8. Chris Sutton 1999-2000
Another signing by Gianluca Vialli that failed to sparkle at Chelsea, and one that former chairman Ken Bates branded a 'disaster'. Sutton's £10 million price tag suggested much was to come with one goal coming in his only season at the club.
7. Slavisa Jokanovic 2000-2002
Claudio Ranieri's first signing at Chelsea turned out to be his worst, with Jokanovic failing to inspire The Blues during his two-year spell. He was forced to see out his contract at the club, with the club admitting he was far from popular upon his departure.
6. Andriy Shevchenko 2006-2009
A signing supposedly motivated by Roman Abramovich, the £30 million Ukrainian failed to live up to his big billing in west-London. The club eventually ended up forking out £3.4 million for each of his league goals, before returning to Milan.
5. Winston Bogarde 2000-2004
A player who admitted he might have been the worst signing in Premier League history, Bogarde made just nine appearances in four years at the club, none of which came during the last three. A figure of ridicule.
4. Robert Fleck 1992-1995
An at the time club record signing, Fleck spent a turbulent three years at Chelsea, scoring just four times in 48 games. Never lacking heart, it was his lack of a finish touch that marred his career at Stamford Bridge.
3. Fernando Torres 2011- present
Having joined Chelsea with the reputation as one of the world's deadliest finishers, Torres has fallen flat the The Blues. He went over 900 minutes before scoring his first goal against West Ham United, while this season's fortunes haven't improve, with a glaring miss against Manchester United the low-light.
2. Mark Bosnich 2001-2003
After a securing a healthy pay packet, but just seven appearances for the club, Bosnich was sacked for failing a drugs test and banned from football for nine months. He failed to rebuild his reputation, eventually ending his career in Australia.
1. Paul Furlong 1994-1996
Regarded by many as one of the worst strikers to ever play for Chelsea, Furlong was the club's record signing in 1994. He subsequently failed to hit his straps at the Bridge and quickly plummeted down the leagues.