The top seven stayed the same on the Road To Singapore leaderboard this week but a familiar face moved back up into eighth place, with Ivanovic rising from 10th to eighth after conquering Monterrey.
After winning her second WTA title of the year at the Monterrey Open, Ivanovic jumped over fellow former World No.1s Maria Sharapova and Jelena Jankovic to put herself back into the top eight, the range that will eventually qualify for the BNP Paribas WTA Championships presented by SC Global.
"Last year I lost very early in Monterrey but I had so much fun that I wanted to come back, so to make it this far this year is amazing," she said. "And every title is so special. I had some tough matches this week but I feel so happy to get through each of them, and this title is definitely one of my favorites."
Ivanovic has been talking about qualifying for Singapore since the beginning of the 2014 season.
"This year I really want to make Singapore, the WTA Championships," she said during her run to the quarterfinals at the Australian Open. "That's my big goal. I'm aware I have to work hard towards it.
"I had a good start, but there's still plenty more weeks of tennis, and there are still many, many matches to come this season. But that would definitely be my biggest goal for this season."
Petkovic's Premier-level triumph on the green clay courts of the Family Circle Tennis Center was a welcome return to the WTA winner's circle - but does the popular German have any new goals now?
"It's crazy, I have to readjust my goals now," Petkovic said. "I will just keep working on becoming a better tennis player and developing my game because I think it really worked out here in some moments, and I have much more margin in my game when I am nervous or when I'm not at my best - I can find solutions to come back and have a Plan B if what I'm used to doing isn't working out there."
Could Petkovic, a former alternate at the WTA Championships, be headed for the elite eight?
There was a bit of a shuffle in the Road To Singapore doubles leaderboard - Italians Errani and Roberta Vinci and Russians Ekaterina Makarova and Elena Vesnina stayed in first and second place, but Americans Raquel Kops-Jones and Abigail Spears moved from fifth to third, pushing Hsieh Su-Wei and Peng Shuai into fourth and Kveta Peschke and Katarina Srebotnik into fifth. Rounding out the top eight teams are Alla Kudryavtseva and Anastasia Rodionova, Cara Black and Sania Mirza, and Anabel Medina Garrigues and Yaroslava Shvedova, who won their biggest title together in Charleston.