Looking at the bottom half draw right now, wow...
Diego Schwartzman has the biggest opportunity right now in terms seeding at the US Open. Currently, he will be seeded 19th at the US Open (Delpo not playing). If he reaches the semifinals, he will be seeded 16th at the US Open.
Also, Medvedev has good chance to reach a career high of number 7 ranking if he reaches the semifinals.
Finally, if RBA reaches in the quarterfinals, he will enter the Top 10 rankings for the first time of his career at age 31!