The two biggest WTA tournaments of the season just around the corner. The BNP Paribas Open kicks off next week, with the Miami Open to follow. With 2,000 points up for grabs in March, here are the storylines we’re keeping an eye on as tennis’ March Madness is set to begin.

Serena Williams back in action: The World No.1 has played just one event since the US Open, making the Australian Open final in January. She withdrew from the Middle East swing citing a flu, but assured reporters this week that she’s ready and raring to go.

Serena is the defending champion – an eight-time champion, to be exact – in Miami and made the semifinals in Indian Wells last year – when she played the tournament for the first time in 14 years. With a hefty lead in the rankings – she has a 3,545 point lead on No.2 Angelique Kerber – Serena’s spot at the top isn’t in jeopardy in March. But these next two tournaments offer a big opportunity for the women behind her to close the gap before the tour moves to clay.

Kickstarter in the desert: The first two months of the season have been a false start for more than a few top players. Simona Halep and Petra Kvitova have just two wins on tour so far. Garbiñe Muguruza showed signs of traction at the Qatar Total Open, but has tallied just four wins on tour.

North America was surprisingly fertile ground for Halep in 2015. But with little momentum coming into March, No.5 Halep could take a rankings hit if she can’t find her form. She’s the defending champion in Indian Wells and went on to make the semifinals in Miami. That’s 1,390 points to defend over the next four weeks.

By contrast, No.9 Kvitova has nothing but points to gain in March. This time last year she announced her decision to take a six-week break from the tour to recharge. This year she returns to Indian Wells without a coach, having announced a split with David Kotyza after the Australian Open.

This time last year I made a big decision to take a break. Now I couldn't be more excited to go back to Indian Wells pic.twitter.com/9zXfykUTJX

— Petra Kvitova (@Petra_Kvitova) March 4, 2016

Venus Williams returns to Indian Wells: Following in her sister’s footsteps, Venus returns to Indian Wells for the first time since 2001. But this is not just a symbolic return. Back up to No.12, Venus comes into the tournament on a seven match win streak, after notching two wins at Fed Cup and capturing her first title of the season at the Taiwan Open.

As Venus wrote in her essay at the The Players Tribune, this is about tennis. “I’m looking forward to the amazing California grounds,” she wrote. “I’m looking forward to the top-notch WTA competition. And I’m looking forward to the fans – who played such an important role in helping to make last year so special. But most of all, I’m looking forward to playing tennis.

“Sounds simple – I know. But after almost 30 years of playing this sport, I’ve learned something. I’ve learned that, no matter what happens, or happened … or where you are, or where you’ve been … at the end of the day: tennis is tennis. It’s always, always tennis. And there’s nothing better.”

Victoria Azarenka looks to get back on track: Assuming she’s healthy – Azarenka withdrew from Acapulco with a left wrist injury – March could be a very good month for Vika. She’s still taken just one loss this season, to Kerber in the Australian Open quarterfinals, and she’s a former champion at both Indian Wells and Miami. Currently ranked No.15, she has just 130 points to defend this month.

Complete the sweep: How significant are Indian Wells and Miami? Complete the sweep and that’s 2,000 points in pocket, the same as winning a Slam. No one has completed the double since Kim Clijsters in 2005. But now that Serena is playing Indian Wells you have to give her more than a shot to complete the sweep, especially given her vice-like grip on Miami.

Young guns: While the veterans have been winning the trophies, the younger generation of players have shown ample signs of an impending insurgency. Belinda Bencic leads the way after making her Top 10 debut after making the final in St. Petersburg, while Sloane Stephens already has two titles, winning her second just last week in Acapulco.

Meanwhile, Eugenie Bouchard has put her 2015 season behind her, making the quarterfinals or better at three of her five tournaments. Daria Gavrilova, Madison Keys, and Daria Kasatkina are also ones to watch over the next four weeks.

Major rankings movement: With Monterrey and Kuala Lumpur still to finish, here is the Road To Singapore Top 10: Angelique Kerber, Carla Suárez Navarro, Agnieszka Radwanska, Serena Williams, Victoria Azarenka, Roberta Vinci, Johanna Konta, Belinda Bencic, Sara Errani, Jelena Ostapenko, and Zhang Shuai.

Raise your hand if you predicted that.

A little over 1,000 points separate No.1 Kerber from No.4 Serena, while less than 500 points separate No.5 from No.20. That extreme bunching means we can expect a significant amount of movement in the RTS this month.

Clean Slate: Martina Hingis and Sania Mirza return to their debut tournament after having their 41-match win streak snapped by Elena Vesnina and Daria Kasatkina in Doha. Last year they went on to win their first three tournaments together at Indian Wells, Miami, and Charleston. Will it be more of the same this year?

All photos courtesy of Getty Images.