Hey albaraau are you experiencing issues with lag in-game or have you in the past, and are just worried about it occurring again during a pivotal game?
If seeing issues with connection, then I'd recommend taking a look at our connection troubleshooting steps here
It will take you a couple of minutes but it should hopefully make a difference for you going forward. Know you are thinking connection, but even offline modes can still be connected online and if seeing issues with the data being transferred it can cause issues.
When you mention lag, are you on PC and if so, or even if on console, what does the lag look like? Is it an FPS drop or does the game pause/slow and then speed up.
Do you play the games or sim them when you see issues?
The more info you can share around the issue and your concerns the better I can help
Darko