Tickets for PVP?

I’ve been playing pvp most the day and now I can’t because i’ve run out of tickets. I thought tickets was for the weekly event? Any clarification on how they work would be great. 

Tickets are used for all online activity. You can regen up to a max of 60 tickets at a time that can be collected from the online mission or pvp menu, to continue playing, or you can purchase more from the store using gold.

Hope this helps.

How do you regen 60? Over time? I just think with the estimated time of a year grinding to get top prize, cheaters and limitations on tickets pvp seems a little challenging :o)