Romelu Lukaku isn't the first Chelsea player to enjoy a second spell at the club, and we have a quiz for you testing your knowledge of other Blues to have returned to Stamford Bridge.
Based on a sequence of the club badges each player wore, can you work out some of the other players to have represented Chelsea in separate stints?
Some are multiple choice, while others you will need to type their name out.
Best of luck, and when you've finished click on the article below the quiz to find out more about two-time Blues...