We play today at the London Stadium, which was originally built for the 2012 Olympic Games. Before that match, see how well you know the Chelsea players who competed in the football tournament at those Games.
The London Stadium is now the home of our next Premier League opponents West Ham United, who we face at 5.30pm on Saturday, but back in 2012 it was known as the Queen Elizabeth Olympic Stadium and hosted that year's London Olympics.
There were plenty of players involved in the football tournaments for those Games who have also represented Chelsea, including current defenders Cesar Azpilicueta and Thiago Silva. Check your knowledge of them by trying to put the 10 listed below in order by the number of appearances they have made for the Blues in all competitions, from highest to lowest. Good luck!
If you fancy using that Chelsea knowledge to try to win some fantastic prizes, don't forget to enter the Play Predictor before the match.