When should I arrive, and what are the parking and ticket-in-app arrangements?

From the National Bank Open's Help Centre:

• Arrival: arrive 60 to 90 minutes ahead of the scheduled time of your first ticketed match. Once admitted, your ticket covers your assigned seat and the grounds until closing, but you must vacate your seat for the next session.
• Parking (Montréal, IGA Stadium): parking in and around the stadium is extremely limited and public transportation is strongly recommended. On-site parking is reserved for buyers of pairs of 100-level Centre Court tickets through the official site; check your ticket for parking and your assigned lot.
• Tickets in the app: tap "Tickets" on the bottom menu of the app home screen. Adding tickets to your phone's mobile wallet is suggested for faster gate entry.