Monica Puig has approached performance from many angles: an Olympic gold medalist who built her game on relentless athleticism and “Pica Power,” a player who retired in 2022 and then turned to marathons, triathlons and IRONMAN events. Now an analyst and self-described tech enthusiast, she has tested WHOOP, Garmin and COROS while training and recovering.

“I’ve tried it all!”

Her experience with continuous tracking shaped how she used the information. “I did wear the WHOOP for a while, but that was back before you could wear it on a match court. I know there’s been some back and forth about whether you can at certain tournaments.

I would wear the WHOOP, but I wouldn’t take the information for myself. My fitness trainer was the one who had the app on his phone and had my WHOOP paired to his phone…” Puig said she handed data to the people charged with her body care to avoid letting numbers skew her mindset.

“It’s a fine line. If you’re really responsible with the information that you receive you can kind of just treat it as it is, which is a number…

If you’re the type of player who gets a little bit too obsessed with the numbers, hand it off to your team, like I did, and have them kind of make the adjustments. Let someone else take care of it, then you just kind of go along for the ride.

Because the numbers are very good for certain things, but there are also metrics that don’t really help you.”

On the measures she found most valuable, Puig emphasized recovery and early illness detection. “Knowing your fatigue levels… I thought WHOOP was really great with this knowing when you’re getting sick. And showing you how the body reacts differently, whether you drink or not, whether you hydrated enough, whether you had a heavy meal or not—all those things can play a part into your recovery.”

She supports allowing devices in matches so teams can analyze how an athlete responds under pressure. “Absolutely. I think it’s really essential, because you can also see the way that your body handles itself in a pressure situation. Your body reacts differently from a match that you win in an hours, versus a match that could go for three hours. And obviously it reacts differently in a match than in practice.

There are so many different factors, and I think nowadays having the information helps you prepare. There’s no reason why it should be concealed from players.

It’s not like the player is looking at that information when they’re playing. It’s not like your coach is going to be saying, ‘Oh my gosh your heart rate is X! You need to get it down to Y!’”

She added that showing biometric data in competition has precedent. “I would love that, and I think the WTA did do that when WHOOP was first a partner (back in 2021).

I’ve seen it in golf a couple of times, where it would show a golfer’s heart rate before they teed off. Then you would be like, OK the heart rate is maybe at 130. They’re feeling the stress. Or if the heart rate was in the 90s, OK they’re feeling alright.”

Elite tennis now treats recovery as a competitive advantage. From screenless wearables to temperature-controlled sleep systems, players and teams are quantifying readiness in ways that would have seemed futuristic only a decade ago.

Aryna Sabalenka’s Sunshine Double run offered a clear example. Using WHOOP, she logged consistently high recovery scores through the Miami Open, with WHOOP CEO Will Ahmed later noting, “This is very hard to do given the strain of the matches and the pressure of the finals. Impressive,” Ahmed wrote. WHOOP’s morning recovery metric combines heart rate variability, resting heart rate, sleep quality, and respiratory rate to estimate preparedness for strain.

Long before wearables were common, Novak Djokovic invested in recovery innovation. He used the CVAC Pod and more recently the Regensis system. Djokovic also entered the wearable space by partnering with Incrediwear on therapeutic sleeves. Taylor Fritz has taken a different route, prioritizing sleep with a high-tech Eight Sleep mattress cover that adjusts temperature and records biometric data. “It makes a huge difference for me when I have it,” Fritz said. “It’s great to see all the data. I feel like I sleep a lot better.” He added, “It’s not easy to bring,” he added. “If it’s a big tournament, like a Grand Slam week or something, then we’ll have one ready where I’m going. This week (in Miami), obviously it’s just at home. Otherwise, sometimes I just don’t have it.” Fritz became an Eight Sleep investor in 2024, and Djokovic collaborated with Incrediwear in 2026.

The sport’s governing bodies have adapted unevenly. The WTA partnered with WHOOP in 2021, while the ATP approved wearables across its tours in 2024. Grand Slam rules remain separate: at the 2026 Australian Open, players were asked to remove WHOOP devices mid-tournament, affecting athletes including Aryna Sabalenka, Carlos Alcaraz and Jannik Sinner. “There is certain data we would like to track a little bit on court,” Sinner said afterward. “It’s not for the live thing. It’s more about what you can see after the match.”

Voices inside the sport warn about information overload. “It’s not like the player is looking at that information when they’re playing,” Puig said. “It’s not like your coach is going to be saying, Oh my gosh your heart rate is X! You need to get it down to Y!”

“It’s more so just information that they can take to better themselves for the upcoming days.” Early research, including a 2025 study of 100 professionals, found measurable gains in stress management and recovery. Still, players stress that basics remain essential: “Of course, you need the ice bath and stretching and massages,” she said. “But there’s so much you can do off court, even at the hotel, that can make a big difference.” Looking ahead, predictive models and AI could personalize recovery further, but the underlying routines will endure.

Aryna Sabalenka has extended her hold on the WTA’s top ranking into a 76th consecutive week, moving into sole possession of the third-longest run at No. 1 this century. Her latest milestone edges past Iga Swiatek’s 75-week streak between 2022 and 2023.

The rise comes immediately after an outstanding Sunshine Swing. Sabalenka became just the fifth woman to complete the Sunshine Double after winning Indian Wells for the first time and Miami for the second consecutive year. That sequence helped cement her place atop the rankings and pushed her career total to 84 weeks at No. 1.

Sabalenka first reached No. 1 for eight weeks in 2023 and then began her second and current stint on October 21st, 2024. Her 76-week run now places her alone third for longest uninterrupted runs at No. 1 since 2000, behind only Serena Williams and Ashleigh Barty. In the WTA’s full historical list dating to 1975, this stretch is tied for the 11th-longest overall.

Form on court has matched the ranking. Sabalenka is 23-1 this year with three titles and has reached the final at each of her last five tournaments. She has not lost before the quarterfinals of any event in more than a year.

As the tour moves toward clay, Sabalenka carries a substantial lead in the standings, ahead by 2,917 points over world No. 2 Elena Rybakina. That cushion may be tested on clay: Sabalenka collected 2,840 clay-court points last year, winning Madrid, reaching the finals at Stuttgart and Roland Garros and making a quarterfinal in Rome. By contrast, Rybakina earned 870 clay points last year, taking a WTA 500 title in Strasbourg but failing to reach the quarterfinals at Madrid, Rome and Roland Garros.

The combination of recent form and a commanding points margin leaves Sabalenka well positioned as the clay season begins, while historical milestones continue to accumulate.