Dementieva's first official tournament of the year was in
Sydney, Australia, where she lost in the second round to
Li Na 3-6, 6-1, 7-5 after being up 5-2 in the third set and holding five match points.
At the
2007 Australian Open, Dementieva matched her career best result at this tournament by reaching the fourth round, where she lost to Nicole Vaidišová 6-3, 6-3.
Dementieva unsuccessfully attempted to defend her singles title at the
Toray Pan Pacific Open in
Tokyo, losing her semifinal match to Martina Hingis 6-4, 6-3. Because of an injury, she could not participate in the tournament in
Paris. Without having fully recovered, she played again in
Antwerp but had to retire from her second round match against
Elena Likhovtseva. She then travelled to
Indian Wells, California to compete in the
Pacific Life Open but withdrew from the tournament at short notice, causing her to lose a lot of points as she is the 2006 runner-up.
Dementieva returned to playing tennis in the Tier II
Warsaw event, where she lost in the second round to Venus Williams. At the Tier I
Qatar Telecom German Open in
Berlin, Dementieva lost to
Nadia Petrova in the third round 6-3, 6-3. At the Tier I
Telecom Italia Masters Roma in
Rome, Dementieva lost in the quarterfinals to Jelena Janković 6-2, 6-1.
In her final tune-up event to the
French Open, Dementieva won the
Istanbul Cup, defeating Frenchwoman
Aravane Rezai in the final. This was her seventh career WTA tour singles title. At the French Open, Dementieva reached the third round before being defeated by Marion Bartoli.
At her first event on grass in
Eastbourne, Dementieva lost easily in the quarters to eventual Wimbledon finalist Bartoli 6-1, 6-0 and she lost in the third round of Wimbledon to
Tamira Paszek 3-6, 6-2, 6-3. Her hardcourt season got off to a better start with Elena reaching the semifinals of
San Diego (beating Bartoli en route), losing to
Patty Schnyder 7-6, 6-0.
At the
East West Bank Classic she lost to Sharapova 6-3, 6-4. At the
Rogers Cup held in
Toronto, she was a shock early casualty when she lost to
Francesca Schiavone 6-7, 6-3, 6-2. Her last event before the U.S. Open was the
Pilot Pen Tennis tournament in
New Haven. She beat
Mara Santangelo, Ashley Harkleroad and
Marion Bartoli en route to the semifinals, but retired in her match against
Svetlana Kuznetsova, the eventual champion.
Her
2007 U.S. Open was cut short by Sybille Bammer in the third round, who handily beat her 6-1, 6-2. Prior to that she had beaten
Stephanie Cohen-Aloro and
Petra Cetkovská.
She then competed in the Tier II China Open in Beijing, China, losing in the quarterfinals to comeback kid Lindsay Davenport 7-6(1), 6-1. In the second round, she routed Austrian teen
Tamira Paszek 6-2, 6-0, and thus avenging her Wimbledon third round loss.
Unseeded in Tier II Stuttgart, with a commentator remarking how many years has it been since she was unseeded in any tournament, Dementieva faced a tough draw, playing two-time Grand Slam champion
Amelie Mauresmo, a match-up worthy of a Grand Slam final. However, Dementieva played well and beat the Frenchwoman 6-2, 7-5, then won her ninth match in 12 career meetings against eighth-seeded Daniela Hantuchova 6-4, 6-4 to reach the quarterfinals. She gave a fight but eventually lost 6-4, 6-4 to world No. 1 Justine Henin of Belgium. Her win against tenth-ranked Hantuchova, who had just arrived from a final appearance in Luxembourg, is her first Top 10 win of the season.
At her home tournament in
Moscow, Dementieva won her first ever
Kremlin Cup title after being runner-up twice in her career, and her second
Tier I title. She made a bad start to her campaign against former world No. 8
Alicia Molik, winning 6-2, 4-6, 6-3, despite committing sixteen double faults. In the second round she ousted number seven seed
Patty Schnyder to set up a match with Maria Sharapova's conqueror,
Victoria Azarenka, which she won 7-6(4), 6-2 to advance to her fifth consecutive
Kremlin Cup semifinal. There she thrashed
Dinara Safina 6-1, 6-0 and met Serena Williams in the final, someone who she had yet to take a set off in four meetings. However, after almost two hours of fight, Dementieva earned her first
Kremlin Cup title and her first ever victory over Williams with a 5-7, 6-1, 6-1 win. It is her second Tier I title after winning Tokyo in January 2006 and allowed her to return to the world's top ten.