How can I call a previous tab from

I’m trying to open a link in the previous tab

there’s 3 pages

• index.html
• schedule.html
• player.html

when on index.html and you press the “player” button it opens on a new tab (What I want).

When I am on the player page and I click the “schedule” button I want it to use the tab with index.html and go to schedule.html.

there is a few websites that do this but I cant figure it out.