Nicolas Anelka left Bolton to join Chelsea on a £ 15million deal that day in 2008.
The forward became Avram Grant’s first capture at Stamford Bridge and signed a three-and-a-half-year contract.
He had spent two years at Bolton and had already scored 11 goals in 22 games that season before Chelsea became the eighth club in his career.
“I want to tell Chelsea fans that I see this as a great opportunity and an honor and I will not disappoint them,” Anelka told the Chelsea website.
“Chelsea are the team I really wanted to join and I hope this will be the last club I play for.
“I’m really looking forward to working with Avram (Grant) and Chelsea’s style of football really suits my game.”
Anelka scored 59 goals in 185 games for Chelsea and won the Premier League and two FA Cups as well as the Golden Boot in 2008-09.
But he also missed the decisive penalty when Chelsea lost in the Champions League final to Manchester United in 2008.
Anelka submitted a transfer request in December 2011 while André Villas-Boas was in charge.
He left for an 18-month stint at Shanghai Shenhua and was also loaned to Juventus.
Anelka returned to England with West Brom in 2013, but her time at Albion ended in controversy after being sacked by the Baggies a year later.
Anelka was suspended for five matches and fined £ 80,000 by the Football Association for making a quenelle sign after scoring against West Ham in December 2013. Anelka has denied that her use of the sign was anti-Semitic.