https://www.pro-football-reference.com/boxscores/win_prob.cgi
Not sure how accurate this calculator is, but I'm using it.
Week 16: Prior to the onside kickoff, win prob = 98.6%
WC: @ 5:37 Chicago 4th-and-8, win prob = 99.7%
Losing one game, it happens. Losing both, no longer bad luck. Now a matter of coaching/execution/whatever.