Change your captain
Round 1 matches will take place over six days, and you can change your captain ahead of each one. Only the player that finishes Round 1 in your armband will score double points.
So, if you have Cristiano Ronaldo or Aleksandr Kolarov in your armband, you probably don’t want to risk making a change. But if your skipper did not do as well as planned, you probably want to select a new one before the Day 4 deadline (14:00 CET on Monday).
Teams boasting Son Heungmin, Kevin De Bruyne, Eden Hazard, Raheem Sterling and Harry Kane are in action on Day 5. And if you choose one of them, and he doesn’t do well, you can always change your captain again ahead of the Day 6 deadline (14:00 CET on Tuesday).
Article source: http://www.fifa.com/worldcup/news/unforeseen-headliners-on-day-4