Up until the meeting with world coach Karolina Pliskova, Czech Republic in the third round, she knocked out two of this year's grand slam semi-finalists and also made a really good match against Pliskova.
In total, Peterson climbs four rankings ahead of the US Open next week.
"I had some points to defend from last year's tournament," Peterson said after the loss to Pliskova.
At its best, the Swedish has been ranked 52nd in October 2018.
- Ranking is not something I put energy on. There will be a new week and new opportunities, she said.