The Indian tennis ace began the year at a career-best 31 on the WTA charts.
The quarter-final loss at the Tashkent Open brought another plunge in her ranking.
Sania Mirza's dream run at the Korea Open came to an end as she went down guns blazing to Virginia Ruano Pascual of Spain in the women's singles quarter-finals.
In what seems to be a mouth-watering clash for Indian tennis fans, Rohan Bopanna set up a semi-final clash with veteran Leander Paes after the two players won their respective mixed doubles matches on Day 8 of the US Open in New York, on Monday.
Leading the field at the US $175,000 event will be former World No. 1 Martina Hingis and India's teenage sensation Sania Mirza.
In another quarter-final at the Dubai Open, Russian third seed Maria Sharapova beat Switzerland's Martina Hingis.
Top seed Kim Clijsters edged past Jelena Jankovic, while Maria Sharapova beat fellow Russian Vera Zvonareva at the Acura Classic.
Images from Day 2 of the Australian Open in Melbourne on Tuesday
Dementieva will face third seed Maria Sharapova, who beat Martina Hingis, in the final of the Pacific Life Open.
So it is over. Two weeks of intriguing tennis where the world's best competed for the year's first Grand Slam. While the match-fixing report cast a shadow over the start of the Australian Open, the tournament gained momentum as it progressed. Rediff.com encapsulates the best moments from the Rod Laver Arena.
'Even at 42, Leander's ball skills, his reflexes at the net, the hand-eye coordination... nothing has diminished. In fact, he is as good as he's ever been.'
Bethanie Mattek-Sands and her partner Lucie Safarova won their first Grand Slam women's doubles title
The top seeded pair beat the unseeded combination of Abigail Spears of the United States and Mexico's Santiago Gonzalez 6-1, 2-6, 11-9 in a thrilling mixed doubles final.
Sania Mirza is in line to win her third Grand Slam title and first with new partner Bruno Soares as the top seeded pair struggled past Yung-Jan Chan and Ross Hutchins to reach the mixed doubles summit clash.
India's tennis star Rohan Bopanna picked young Saketh Myneni over the legendary Leander Paes as his choice of partner for the men's doubles event at the Rio Games, on Friday.
Former world number one Maria Sharapova avenged her US Open loss to Anastasija Sevastova with a 7-6(3), 5-7, 7-6(7) victory over the Latvian in the China Open first round on Saturday.
Vanity Fair's August issue, featuring Caitlyn Jenner, formerly known as 1976 Olympic gold medal-winning decathlon champion Bruce Jenner, on the cover was the magazine's best-selling issue in years. Covers featuring tennis aces Serena Williams, Sania Mirza and Maria Sharapova also delighted in 2015. Check them out.
Right now both of us have busy schedules meeting our sporting commitments, Shoaib Malik said.
A long measure of Grand Slam patience paid off for Peng Shuai of China, who reached the semi-finals of the US Open on Tuesday by routing Swiss teenager Belinda Bencic 6-2, 6-1 in the Flushing Meadows heat.
Serena will be chasing her seventh grand slam title on Saturday against a 17-year-old who has taken her second Wimbledon by storm.
A quick guide into the life of Serena Williams, the GOAT - The Greatest of All Time!
As tennis raise hopes of an Indian medal at the Rip Olympics, Bikash Mohapatra/Rediff.com put things in perspective.
Croatia's Mirjana Lucic-Baroni, who made the third round of the 1997 US Open also at 15, was the previous youngest player to advance to that stage of a grand slam.
While every other team practises their hardest in the few hours left for the Rio Olympics 2016, the Indian contingent was left looking for rooms, extra pair of jerseys and assembling chairs.
The teenager stunned champion Serena Williams 6-1 6-4 in the Wimbledon final to become the first Russian to win a singles title at the championships.
Sania Mirza was recommended for the prestigious Rajiv Gandhi Khel Ratna award on Tuesday. She is only the second tennis player ever to be named for the country's highest sporting honour.
Gunning for a record seventh appearance at the Olympics this year, one more milestone beckons veteran Indian tennis star Leander Paes which is a testament to his longevity on the professional circuit. If the 42-year-old veteran manages to win 11 more matches on the ATP doubles tour this season, he will displace American Sherwood Stewart in the list of players with most number of doubles wins. Stewart is sitting sixth in the table with 728 wins while Paes, a winner of 17 Grand Slam titles, has taken his number to 718 after reaching the third round of the ongoing French Open in Paris. These staggering statistics do not include Paes' victories in the mixed doubles event and the ones on the ATP Challenger Tour. Last year when Paes recorded his last win of the season, he overtook Sweden's Jonas Bjorkman (712), ending 2015 with 713 wins.
Pakistan's ex-cricket captain Shoaib Malik says he is proud his Indian wife Sania Mirza has become the world's top-ranked doubles tennis player, adding it is honour for both countries.
Indian tennis star Sania Mirza, on Saturday, said she has had a 'solid year already' and hopes to build on it with her new women's doubles partner - Yaroslava Shvedova of Kazakhstan.
Simona Halep became the first Romanian in 40 years to lift the French Open trophy at Roland Garros on Saturday.
The 44-year-old veteran says he has not lost hope and by his own admission, he is still playing the game for the love of it.
After achieving the rare feat of being the World No. 1 in women's doubles for 80 consecutive weeks, Indian tennis star Sania Mirza has said it was very satisfying to be bracketed with the legends of the game.
Women dominated this year's Padma awards for sports with tennis star Sania Mirza and ace shuttler Saina Nehwal getting the nod for the Padma Bhushan, while archer Deepika Kumari was chosen for the Padma Shri in New Delhi, on Monday.
Factbox on American Serena Williams, who plays sister Venus in the final of the Australian Open on Saturday.
Sania Mirza savoured a historic 2015 as she became the first female player from India to win a women's doubles Grand Slam title on way to becoming World No 1 even as Yuki Bhambri presented himself in a new 'avtar', raising hopes on the otherwise barren singles circuit.
British player Dan Evans has been provisionally suspended after admitting on Friday that he had failed a doping test for cocaine at the Barcelona Open in April.
Mirjana Lucic-Baroni could barely contain her joy after continuing her remarkable run at the Australian Open to reach her first grand slam quarter-final since the 1999 Wimbledon championships on Monday.