1. Find huge pre-match favs.
2. Wait until there's a TB in the 3rd set
3. Take the fav at close to evens

E.g. Rublev vs Coria, easy 7:2 TB win at 1.9/-110.

I wonder if it works long term but I figure that favs that are supposed to win 75+% before the match should do better than 50% in set 3 tiebreaks.