It can be,that you have some games of your partner or your opponent,which you want to observe constantly.
At the moment you first have to search these games.You have to click on the player`s profile,then on the tournement and then on the the special game,which you want to observe.
If you have a watchlist,you can put this (these) observed game(s)in the list und can see the games at once if you open the list.(Wow,complicated to declare for me:))