To open the scoreboard, just go to the team league page and open the “Matches” section. If the line up is done(players are selected to play the matches) the information next to the team match will be shown as a green label with text “in play”. Click on the “ i ” button next to it and you will be redirected to the page with individual/double matches for this team match.
In this page you can see the individual/double matches for the team match. Click the “3 dots” button for the match where you want to use the scoreboard and select “Scoreboard”