Grand Slam winners = 2,000 points
Runner-up = 1,000 points
Semi finals = 720 points
QF = 360 points
Masters 1000
Masters 1000 winners = 1,000 points
Runner-up = 5,000 points
Semi finals = 360 points
QF = 180 points
Master 500, 250 same point system just cut it in half.
So Medvedev can still catch up Roger Federer at the end of the year if he landed at last into the semis, runner up or winner to gain more points, so a 1,000 point lead is not enough.
I was thinking about the huge gap between top two and third/fourth rank. But it seems like a good planning in a GS and executing it properly can rank up a player very quickly. It's much easier for a good player when their opponent (in the point table) eliminates early from a tournament. Like that happened with Novak Djokovic in the US Open.
Right, if any of the top 3 is eliminated early and didn't reach at least round of 16, there is a good chance that he can rank up pretty quick specially if Medvedev is going to win every tournament he enters. I think 10 points is automatic to gain once you enter tournaments though, but it doesn't make any sense. You really need to be consistent rearching finals/semis to be in the top 3. So it is still a wide and open reach and Medvedev can really enter and break the top 3 this year.