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2. Kerber begins her quest to reclaim No.1.
Kerber fell from the top spot after Serena Williams won her 23rd Grand Slam title at the Australian Open, but all is not lost for the German. Should she reach the final in Doha, she could return to No.1 at the Dubai Duty Free Tennis Championships, where she'd also have to reach the final. With a bye in the first round, the 2014 runner-up will open against either Irina-Camelia Begu or Daria Kasatkina, who upset her at the Apia International Sydney.

3. Pliskova rides Fed Cup victories into Doha.
Pilskova began 2017 riding a nine-match winning streak through the Brisbane International and into the quarterfinals in Melbourne. The Czech shook off the surprise loss to Mirjana Lucic-Baroni with a dominating display over Fed Cup weekend, where she earned wins over Lara Arruabarrena and, most impressively, a 60-minute romp past reigning French Open champion Garbiñe Muguruza. Seeded second in Doha, Pliskova opens against either a qualifier or Caroline Garcia.

4. Can Cibulkova shake off Aussie disappointment?
Dominika Cibulkova ended 2016 on a career-high, winning the BNP Paribas WTA Finals Singapore presented by SC Global, but the World No.5 fell before the second week in Australia to an inspired Ekaterina Makarova. Fresh off a run to the semifinals of the St. Petersburg Ladies Trophy, the Slovak is the No.3 seed in Doha, and will begin her week against either Anastasia Pavlyuchenkova or a qualifier, with No.8 seed Barbora Strycova looming in the last eight.

5. Will Wozniacki renew her rivalry with Radwanska in Doha?
The Asian Swing was dominated by the head-to-head between Agnieszka Radwanska and Caroline Wozniacki. The resurgent Dane upset Radwanska en route to the Toray Pan Pacific Open title but the Pole got the better of Wozniacki in Wuhan and Beijing. Should the former No.1 beat Kiki Bertens, she'll face the No.4 seed in the second round.

6. Muguruza aims for Fed Cup revenge.
Muguruza shakes off a tough defeat against Pliskova and has a chance to avange the loss in Doha, as they're projected to meet in the quarterfinals. Standing in her way is wildcard Cagla Buyukakcay, who made her WTA breakthrough at this event last year - upsetting Lucie Safarova en route to the third round.

7. Fed Cup heroes face off.
After a long Fed Cup weekend, plenty of players will aim to take that momentum into the Middle East. One of the must-watch first rounds includes Yulia Putintseva, who reached her first WTA final in St. Petersburg and helped Kazakhstan into World Group II Play-Offs, and No.7 seed Timea Bacsinszky, who led Switzerland into the World Group I semifinals.

8. Hingis unveils new partnership in doubles.
Martina Hingis began the 2017 season continuing her partnership with CoCo Vandeweghe, but the Swiss Miss comes to Doha with Chan Yung-Jan as top seeds. Chan made two straight WTA Finals with sister Hao-Ching, and can certainly fulfill the power dynamic the cerebral Swiss requires in a doubles partner. The pair play their first match against Kiki Bertens and Johanna Larsson.

9. Hlavackova & Peng seek to maintain Melbourne momentum.
Speaking of Chan Hao-Ching, the Taiwanese doubles star begins her new partnership with Christina McHale. The pair will have their work cut out for them against No.3 seeds Andrea Hlavackova and Peng Shuai. The Czech/Chinese duo renewed their partnership at the start of 2017 and roared into the Australian Open final, narrrowly falling to World No.1 Bethanie Mattek-Sands and Lucie Safarova.

10. Mirza & Strycova soldier on.
Fresh off her excellent Fed Cup weekend - in which she pushed Muguruza to three sets and ousted Arruabarrena to clinch victory for the Czechs - Barbora Strycova reunites with Sania Mirza as the No.2 seeds in Doha. As they remain together, they face Raquel Atawo and Xu Yi-Fan, one of 2017's newer pairs, in the first round.

- Kristyna Pliskova is quickly rising out from under the shadow of twin sister and World No.3 Karolina as the Czech lefty scored a big upset at the Dubai Duty Free Tennis Championships, dispatching No.16 seed Roberta Vinci, 3-6, 7-5, 6-3.

"All week I felt pretty bad in practice, so I'm happy I made it through this match," she said after the match. "It wasn't easy at all."

As Karolina was reaching her maiden Grand Slam final at last summer's US Open, Kristyna was making a breakthrough of her own at the WTA 125K Series event in Dalian, following that up with her first career title at the Tashkent Open. Ranked just shy of her career-high of No.55, Pliskova earned a comeback victory over Vinci, a runner-up in Flushing back in 2015.

"It's much slower on the Center Court and the balls aren't flying that much. Plus, she's a tricky opponent."

Vinci appeared in control as she served for the match in the second set, but Pliskova broke back and rode the momentum into a decisive three-set victory after just under two hours on court. With a serve as big - if not bigger - than her sister's, the 24-year-old struck nine aces throughout and maintained an impressive 82% winning percentage behind her first serve, losing just two points in the decider.

"I was trying to fight all match, but sometimes you have a few bad games. She was solid, serving well. I resolved to be more aggressive and that's when she started making a few more mistakes."

Up next for Pliskova is a potentially tough challenge in either ASB Classic champion Lauren Davis or lucky loser (and Taiwan Open semifinalist) Mandy Minella.

"I'm happy to still be in the tournament and to fight for another win."