VIDEO: The best players to play for Crystal Palace and Chelsea
Michy Batshuayi, Gary Cahill and Patrick van Aanholt are just some of the players to have represented both London clubs.
Crystal Palace face Chelsea on Saturday in an all-London clash, a game in which there will be a few familiar faces for both teams. This will be nothing new - the two clubs have shared a number of players over the years.
The Blues will be hoping to use their momentum from a vital 0-2 win against Porto in Wednesday night's Champions League match to bounce back from their last Premier League game - a shocking 2-5 home defeat to West Brom.
Meanwhile, Palace will be hoping to build upon their solid 1-1 draw away to Everton on Monday night, where ex-Chelsea player Michy Batshuayi pulled one back in the 86th minute.