On 25 August 2007, Dulko won her second WTA title at the Forest Hills Tier-IV event, defeating Virginie Razzano.

On 4 May 2008, she won her third WTA title at the Grand Prix SAR La Princesse Lalla Meryem Tier-IV event, defeating Anabel Medina Garrigues.

[6] In January, she played at the Hong Kong Tennis Classic with two Americans, CoCo Vandeweghe and Venus Williams, and then started the year with a quarter-final appearance at the Hobart International, losing to Iveta Benešová.

[7] In the first round of the Fed Cup, she gave her team their only wins when she defeated Americans Melanie Oudin and Jill Craybas.

She then reached the quarter-finals of the Monterrey Open and the Porsche Tennis Grand Prix, and the third round of mandatory events in Indian Wells and Miami.

She again played at the Hong Kong Tennis Classic, and won Silver Group Championships with Venus Williams and Michael Chang, and then she started the year at the Hobart International, where she reached the quarter-finals, losing to Medina Garrigues.

Seeded 31st at the BNP Paribas Open in Indian Wells, she gained the biggest victory of her career by defeating the former world No.

In the doubles, Dulko and Flavia Pennetta won their first WTA Premier title, beating Petrova and Samantha Stosur in three sets.

Dulko and Pennetta also won the Porsche Tennis Grand Prix in Stuttgart and the Internazionali d'Italia in Rome, and extended their winning streak to 19 matches before losing in the final of the Madrid Open to Serena and Venus Williams.

Dulko and Pennetta won a marathon doubles final at the Rogers Cup in Montreal, beating Květa Peschke and Katarina Srebotnik, for their fifth title of the season.

In the doubles, Dulko and Pennetta lost in the final to Olga Govortsova and Chan Yung-jan, and then won their sixth event of the season at the Kremlin Cup in Moscow.

[12] Dulko and Pennetta to won their first Grand Slam event title at the 2011 Australian Open, defeating Azarenka and Kirilenko 2–6, 7–5, 6–1 in the final.

[14] Aged 27, Dulko announced her retirement from professional tennis in November 2012, stating that she no longer had the "same drive" and willingness to make the "sacrifices" needed to compete on the WTA circuit.