Here's an early look at a forecast for the next major. This report builds a hypothetical 128-player draw and seeds the top 32 using the current official rankings. 100,000 random brackets (following conventional seeding rules) are generated, then simulated using the current surface-weighted Elo ratings.
The results are sorted by each player's probability of winning the title. Here is the most recent forecast for the 2020 Men's Roland Garros:
Updated weekly(ish). Last update: 2020-03-09