Oudin started her 2013 season at the Apia International Sydney.
She lost in the second round of qualifying to Estrella Cabeza Candela.
At the Australian Open, Oudin was defeated in the first round by Laura Robson.

Competing in Tennessee at the U.S. National Indoor Tennis Championships, Oudin lost in the first round to Andrea Hlaváčková.
In March, Oudin played at the BNP Paribas Open.
She was defeated in the first round by wildcard and compatriot Madison Keys.
At the Sony Open Tennis, Oudin lost in the first round of qualifying to Alexa Glatch.
Seeded eighth at The Oaks Club Challenger, Oudin was defeated in the first round by Estrella Cabeza Candela.

Oudin began her preparation for the French Open at the Family Circle Cup.
She lost in the first round to ninth seed, 2007 Champion, and eventual finalist Jelena Janković.
At the Portugal Open, Oudin was defeated in the first round of qualifying by Valeria Savinykh.
Oudin fell in the final round of qualifying in Madrid at the Mutua Madrid Open to Chanelle Scheepers.
Getting past qualifying at the Italian Open, Oudin won her first-round match when her opponent, Ekaterina Makarova, retired due to a left Achilles tendon injury.
Despite winning the first set, she lost in the second round to fourteenth seed Dominika Cibulková.
Entering the Brussels Open after coming through qualifying, Oudin was defeated in the first round by Romina Oprandi.
At the French Open, Oudin upset twenty-eighth seed Tamira Paszek in the first round.
She lost in the second round to Jie Zheng.

Oudin started her grass-court season at the Aegon Classic.
Even though she was the defending champion, she was defeated in the first round by qualifier Ajla Tomljanović.
In Eastbourne at the Aegon International, Oudin advanced to the final round of qualifying where she lost to Olga Puchkova.
At the Wimbledon Championships, Oudin was defeated in the first round by qualifier Michelle Larcher de Brito.

Oudin began her US Open series at the Citi Open.
She reached the second round where she lost to top seed Angelique Kerber.
At the Western & Southern Open, Oudin was defeated in the first round of qualifying by Chanelle Scheepers.
Playing at the final Grand Slam of the year, the US Open, Oudin lost in the first round of qualifying to Elena Baltacha.

During the week of September ninth, Oudin competed in Quebec City at the Challenge Bell.
Although she came through the qualifying rounds, she was defeated in the first round by second seed Kristina Mladenovic.
Seeded sixth at the Coleman Vision Tennis Championships, Oudin lost in her second-round match to Petra Rampre.
Oudin won the Party Rock Open, a $50k ITF tournament in Las Vegas, beating compatriot Coco Vandeweghe in the final.
Seeded third at the 25k ITF tournament in Rock Hill, South Carolina, Oudin made it to the semifinal where she was defeated by top seed Mariana Duque Mariño.
Seeded third in Canada at the Challenger Banque Nationale de Saguenay, Oudin lost in the semifinal round to second seed Coco Vandeweghe.
After Saguenay, Oudin stayed in Canada to compete at the Tevlin Women's Challenger in Toronto.
Seeded third, she was defeated in her semifinal match by Tímea Babos.
Oudin competed in her final tournament of the season at the South Seas Island Resort Women's Pro Classic.
She lost in the first round to compatriot Allie Kiick.

Oudin ended the season ranked 127.
Oudin started her 2013 season at the Apia International Sydney. She lost in the second round of qualifying to Estrella Cabeza Candela. At the Australian Open, Oudin was defeated in the first round by Laura Robson.
Competing in Tennessee at the U.S. National Indoor Tennis Championships, Oudin lost in the first round to Andrea Hlaváčková. In March, Oudin played at the BNP Paribas Open. She was defeated in the first round by wildcard and compatriot Madison Keys. At the Sony Open Tennis, Oudin lost in the first round of qualifying to Alexa Glatch. Seeded eighth at The Oaks Club Challenger, Oudin was defeated in the first round by Estrella Cabeza Candela.
Oudin began her preparation for the French Open at the Family Circle Cup. She lost in the first round to ninth seed, 2007 Champion, and eventual finalist Jelena Janković. At the Portugal Open, Oudin was defeated in the first round of qualifying by Valeria Savinykh. Oudin fell in the final round of qualifying in Madrid at the Mutua Madrid Open to Chanelle Scheepers. Getting past qualifying at the Italian Open, Oudin won her first-round match when her opponent, Ekaterina Makarova, retired due to a left Achilles tendon injury. Despite winning the first set, she lost in the second round to fourteenth seed Dominika Cibulková. Entering the Brussels Open after coming through qualifying, Oudin was defeated in the first round by Romina Oprandi. At the French Open, Oudin upset twenty-eighth seed Tamira Paszek in the first round. She lost in the second round to Jie Zheng.
Oudin started her grass-court season at the Aegon Classic. Even though she was the defending champion, she was defeated in the first round by qualifier Ajla Tomljanović. In Eastbourne at the Aegon International, Oudin advanced to the final round of qualifying where she lost to Olga Puchkova. At the Wimbledon Championships, Oudin was defeated in the first round by qualifier Michelle Larcher de Brito.
Oudin began her US Open series at the Citi Open. She reached the second round where she lost to top seed Angelique Kerber. At the Western & Southern Open, Oudin was defeated in the first round of qualifying by Chanelle Scheepers. Playing at the final Grand Slam of the year, the US Open, Oudin lost in the first round of qualifying to Elena Baltacha.
During the week of September ninth, Oudin competed in Quebec City at the Challenge Bell. Although she came through the qualifying rounds, she was defeated in the first round by second seed Kristina Mladenovic. Seeded sixth at the Coleman Vision Tennis Championships, Oudin lost in her second-round match to Petra Rampre. Oudin won the Party Rock Open, a $50k ITF tournament in Las Vegas, beating compatriot Coco Vandeweghe in the final. Seeded third at the 25k ITF tournament in Rock Hill, South Carolina, Oudin made it to the semifinal where she was defeated by top seed Mariana Duque Mariño. Seeded third in Canada at the Challenger Banque Nationale de Saguenay, Oudin lost in the semifinal round to second seed Coco Vandeweghe. After Saguenay, Oudin stayed in Canada to compete at the Tevlin Women's Challenger in Toronto. Seeded third, she was defeated in her semifinal match by Tímea Babos. Oudin competed in her final tournament of the season at the South Seas Island Resort Women's Pro Classic. She lost in the first round to compatriot Allie Kiick.
Oudin ended the season ranked 127.
Melanie Oudin