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What creates a ‘heavy’ tennis shot? Explaining weight, spin and swingweight

Heavy ball comes from speed plus spin; weight and swingweight determine how the ball feels. Key now.

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A reader asked whether lighter “tweener” frames around 300 grams can be the most powerful, and why testers sometimes note a different, “heavy penetrating” quality from heavier racquets. The question highlights a useful distinction: a heavy ball is not only about raw pace. It is a shot that combines speed and topspin so the ball feels to the opponent as if it carries extra mass, making it harder to redirect.

Producing that sensation requires two linked elements: high racquet head speed to whip the face through contact and stringing that maximizes spin. Polyester strings and a fast accelerating swing let the ball bite into the stringbed and come off with rotation and velocity. Basic physics also explains part of the story: force equals mass times acceleration. All else equal, a heavier frame swung at the same speed will transfer more force to the ball, though frame stiffness and weight distribution alter that simple assumption.

“It may not seem like much, but for some players an extra five grams placed toward the top of the frame can feel like strapping a piano to the racquet’s back.” Players accustomed to 315 grams or heavier unstrung often report that a 300 gram model feels whippier and underpowered. Their standard swing depends on mass carrying through contact; a lighter tool forces them to swing faster or change mechanics. That can produce timing problems and reduced penetration, so adding mass to a frame is often a simpler route than radically altering stroke speed. Hence the old coaching maxim of using the heaviest racquet you can comfortably swing.

At the same time, many heavier frames are designed for control and precision: thinner beams, smaller heads and more flexibility, which can reduce inherent power outside the sweet spot. Conversely, lighter, stiff tweener frames can feel more powerful and forgiving for players who need help generating pace.

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Yes, you can deliver a heavy ball with a lighter racquet. The key metric now is swingweight — balancing rapid acceleration with enough heft so speed and topspin combine to make the shot feel heavy.

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Equipment Player News

Raducanu Leaves Nike for Uniqlo Ahead of the Sunshine Double

Raducanu leaves Nike for Uniqlo; brand teases new face. Report: she’ll help design and run outreach.

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Emma Raducanu has ended a long apparel relationship with Nike, the brand that sponsored her since she was 15, and has signed with Uniqlo. The 2021 US Open champion will be the first female tennis player to join the Japanese label after the move was confirmed by the brand on Monday.

During the offseason Raducanu was seen “experimenting” with a Yonex racquet, only to remain with Wilson once the season began. Contract talk has trailed her for months; tennis podcaster Craig Shapiro claimed last month that the Brit would make upwards of $3 million annually with an impending switch to the Japanese brand.

Uniqlo teased the signing by posting the body of a female player posed in blue tennis attire with red details on its social channels before revealing Raducanu as the new face. The brand’s announcement included the line: “Emma will champion UNIQLO’s LifeWear philosophy, which is committed to pursuing excellence, making meaningful contributions to society, and empowering the next generation,” the announcement on Uniqlo’s channels read.

Nike remains a sponsor of top players named in recent coverage, and Raducanu is the latest prominent athlete to depart the sportswear giant. Other recent moves away from Nike noted in reports include Taylor Fritz (Boss), Frances Tiafoe (Lululemon) and Jack Draper (Vuori).

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Raducanu’s deal with Uniqlo has been compared in reporting to the arrangement the brand struck with Roger Federer in 2018. A report in The Athletic said that “Raducanu will play an active role in designing her on-court apparel and will participate in community-engagement activities worldwide, in a similar way to Federer and the actress Cate Blanchett, who joined as a global brand ambassador last summer.”

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Equipment Milano Cortina 2026 Player News

Nike Atelier unveils one-of-one winter performance look for Jannik Sinner

Nike Atelier created a one-of-one winter performance look with Jannik Sinner for Milan Cortina. 2026

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Nike’s design division, Nike Atelier, collaborated with Jannik Sinner to produce a one-of-one performance outfit that nods to his alpine roots during the 2026 Milan Cortina Games. Raised near the Dolomites, Sinner was a national champion in giant slalom before focusing on tennis, and the bespoke collection was intended to reflect that background.

The custom set included a bespoke jacket, an insulated vest featuring adaptive A.I.R. technology, tailored pants and matching footwear. Sinner wore the pieces for one-on-one interviews with global fashion media in Milan alongside Nike Chief Design Officer Martin Lotti and at a special event marking the relaunch of All Conditions Gear, known as ACG.

“For me, it’s very important to always have a small sign of where I’m from,” the ATP’s world No. 2 said via the Nike website.

The sculptural, winter-ready silhouette emphasizes deep pleats and a boxy cocoon shape, and it served as a focal point for Nike’s presence at the Games. Nike is not an official Winter Olympics partner, but the brand maintained a visible presence in Milan and Cortina through pop-up activations. Those included a surprise appearance when Sinner punched tickets aboard the “ACG Express” at Milan’s Centrale station while wearing pieces from his custom collection.

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Made to Sinner’s exact specifications by Nike Atelier, the outfit was crafted by Senior Design Director Raffaella Barbey in collaboration with Lotti and a multidisciplinary team. Barbey conducted fittings with Sinner in Melbourne during his Australian Open run and refined the garments through multiple rounds of feedback and iteration.

“When a brand invests this much thought and energy into a single moment, it shows they really care about making the athlete feel special. That’s one of the biggest reasons why I love being with Nike—they make you feel important.”

“This experience felt very different from work I’ve done with other brands,” Sinner says. “I was more involved in the process. There were a lot of conversations about what could be better, what wasn’t right, what worked well. In the end, we came out with an incredible result.”

World No. 2 Sinner opened the year with a run to the semifinals at the Australian Open, where he had been the two-time defending champion, before falling to a resurgent Novak Djokovic in five sets.

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ATP Equipment Grand Slam

Air Jordan 7 ‘Tennis Day’ pays homage to Andre Agassi’s 1990 pink kit for US Open release

Air Jordan 7 ‘Tennis Day’ tribute to Andre Agassi due at US Open, echoing his 1990 pink look later.

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A sneaker styled in tribute to Andre Agassi is expected to debut during the US Open, reviving one of his most memorable looks. The International Tennis Hall of Famer is reportedly receiving an Air Jordan 7 ‘Tennis Day’ that channels his vintage Air Tech Challenge 2 design.

Reports describe the colorway as Phantom/Lemon Twist/Pink Blast/Anthracite. Official information is limited, but a newly circulated visual mock-up suggests the shoe will reference the popping pink outfit Agassi wore to reach his first Grand Slam final in Paris in 1990.

The release is timed to coincide with the US Open, a tournament Agassi won twice, and the reported design connects a modern Air Jordan 7 to the player’s on-court style from that era. While details remain sparse, the mock-up and color notes frame the sneaker as a clear nod to that distinctive ensemble.

Agassi has spoken about that Roland Garros kit, calling it one of his favorites and recalling how his black denim shorts, hot-pink tights, matching pink-print top and headband, and sneakers drew criticism at the 1990 tournament. The criticism came from Philippe Chatrier, who was also the head of the French tennis federation and the International Tennis Federation president at Roland Garros in 1990.

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“At the time, [he] was thinking about bringing in a dress code,” Agassi recalled, “so I did what any noble person would do and I called him a bozo in the press conference. That was a little bit regrettable, but it was an honest reaction to someone telling me what I had to wear.”

Until an official announcement confirms construction, materials and availability, the connection between the Air Jordan 7 ‘Tennis Day’ and Agassi’s 1990 look rests on mock-ups and reports. The stated timing during the US Open and the specific Phantom/Lemon Twist/Pink Blast/Anthracite colorway position the shoe as a nostalgic tribute to a defining fashion moment in Agassi’s career.

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