Chelsea pranksters play practical joke outside the Emirates Stadium . The Arsenal fans were left in tears after a prank involving an inflatable doll and a bottle of water was played out on their home ground by two Chelsea fans.
Chelsea pranksters play practical joke outside the Emirates Stadium . Four masked men replace Arsenal sign with blue and white letters . Chelsea signing is removed by club staff after just 10 minutes . Premier League rivals go head-to-head at the Emirates on Sunday . Chelsea are currently 10 points clear at Premier League 's summit .