In order to track player statistics please go to General > Group Ranking > Track player statistics. You can either use the predefined goals, attendance, yellow cards and red cards statistics or add your own. When you enter a score from the Results page you'll be able to enter the player statistics as well as the final match result.
To be able to record player statistics you'll also have to add individual players to the teams via the Participants > Teams page.
Currently it's not possible to enter player statistics via the login links. If you have enabled player statistics, please only enter scores via the tournament admin.