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Becoming a Line Umpire at a Challenger Event

Line umpires at Challengers must be qualified, travel extensively and face pressure from technology.

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Staging a Challenger requires a small army of volunteers and officials. Among them, line umpires form a multinational, mobile workforce tasked with monitoring baselines, sidelines and service lines.

Last year the crew at the Hamburg Tennis Association numbered 22 and represented twelve nations. Selection is determined by the event’s needs and each official’s experience. Line umpires can apply for specific tournaments and the Chief of Officials extends invitations to the chosen candidates.

“You need a specific qualification to work as a line umpire at a Challenger event,” explains Vlada, a tennis umpire from the Ukrainian Tennis Federation. Originally from Kyiv and now based in London, she and her colleagues stressed that national-level umpire training is a prerequisite. “Everyone has completed national-level umpire training.”

Umpires can progress through further certifications. Vlada holds a White Badge, part of a tiered system likened to Olympic medals: bronze, silver and gold. She works full-time on the international tour and has stood on the lines at ATP Masters events such as the Mutua Madrid Open. “That’s my absolute favorite tournament,” she said enthusiastically.

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On court, officials rotate in a strict schedule: 45 minutes on followed by 45 minutes off. Indoor events offer fewer distractions, Maria noted. “At indoor tournaments it’s easier for me to stay focused. You’re not affected by outside factors like sun or wind,” said Maria, a sports management student from Ukraine who lives in Kyiv.

Experience varies: Guilherme from Lisbon has been active for over a year and worked at the ATP event in Estoril. “This week we have an outstanding team, I’d even say one of the best,” he said. Miljan from Bosnia and Herzegovina has been part of the traveling group for ten years and detailed practicalities of the job. “We usually arrange our own travel. The hotel is generally provided.”

Miljan also flagged a wider challenge: the spread of electronic line-calling at higher-level events. “This makes competition among line umpires tougher, because fewer of us are needed,” he said. At Challenger level the technology remains less common, preserving roles for on-court officials. A line umpire holds the baseline behind Andrea Pellegrino at the Estoril Challenger.

Travel, tight schedules and limited downtime shape the work, but for many officials the role remains a valued part of the sport.

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ATP BNP Paribas Open Masters

From Fans to Contenders: Iva Jovic and Learner Tien’s Indian Wells Homecoming

Iva Jovic and Learner Tien grew up visiting Indian Wells and return this year as rising tour stars .

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As children both Iva Jovic and Learner Tien visited Indian Wells with their families, the Tiens driving from Irvine and the Jovics from Torrance. Each arrived as a fan: Jovic waited in the sun for two and a half hours to try to get Novak Djokovic’s autograph; Tien’s earliest priority was the tournament’s frozen lemonades. “Those things are one of the greatest things ever,” he said, and he also remembers snagging a signature as Djokovic walked out of Centre Court. “I was one of the people hanging over the wall.”

Their journeys to the professional ranks have been rapid. Jovic only committed to tennis full time after the pandemic closed other sports in 2020. A year later she won the Orange Bowl and, four years after that, reached the Top 50. After an extensive pre-season working with coach Tom Gutteridge, she described the process plainly: “I took a pretty long pre-season, so I had a lot of time to get everything done.” She added, “There was a couple of specific things I was working on. There was a lot of physical stuff in the gym, a couple of technical tweaks with my ground strokes, with my serve, which took time as well.” The work showed in 2026: a final in Hobart, a first major quarterfinal in Melbourne and a 13-4 start to the season that left her ranked No. 18.

Tien’s progression has been similarly steady. After joining the tour in 2025 he displayed consistency and smart point construction, rising into the Top 30 as a rookie. By February 2026 he was at a career-high No. 23. He enlisted Michael Chang for coaching last summer to refine his serve, toss and tactics and has seen results, including a quarterfinal in Australia and a semifinal in Delray Beach. On Chang he said, “In general I think he’s very encouraging. He’s never getting down whether I’m playing well or whether I’m playing poorly. He’s always just consistently just giving me good energy, a lot of support.” He later joked, “There’s not that much video from way back then.”

Both players are second-generation Californians with immigrant family stories and compact frames — Tien 5’11, Jovic 5’7 — yet both have carved pathways that rely on craft, fitness and variety rather than sheer power. Tien will also appear in the doubles draw with Daniil Medvedev. For both, Indian Wells is a homecoming and a moment to return to the other side of the autograph line.

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Cobolli Downs Tiafoe to Claim Acapulco Title, Poised for Career-High No. 15

Cobolli beats Tiafoe 7-6(4), 6-4 to win Acapulco; third ATP title and a projected rise to No. 15 now

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Flavio Cobolli completed a remarkable week in Acapulco with a 7-6 (4), 6-4 victory over Frances Tiafoe to lift the ATP 500 trophy. The straight-sets scoreline belies a hard-fought encounter that lasted two hours and nine minutes, with the opening set alone running 70 minutes.

The win is Cobolli’s third ATP title and matches the biggest level of his previous triumphs. His first two tour-level trophies came last year, both on clay: Bucharest, an ATP 250, and Hamburg, an ATP 500. With the rankings update on Monday, he is projected to move from No. 20 to a new career-high of No. 15, surpassing his prior peak of No. 17.

Both finalists had dramatic semifinal nights. Cobolli rallied from 3-1 down in the deciding set to beat Miomir Kecmanovic, 7-6 (5), 3-6, 6-4. Tiafoe survived an all-American duel with Brandon Nakashima, 3-6, 7-6 (6), 6-4, after Nakashima served for the match at 6-5 in the second set and then came within two points of victory at 6-all in the tiebreak.

In the final Tiafoe threatened early, holding a 3-1 advantage in the first-set tiebreak before Cobolli edged the set. Tiafoe rallied again in the second, breaking back to level at 4-all, but Cobolli closed the match by winning eight of the final 10 points, breaking for 5-4 and sealing the title with an ace, his 10th of the match.

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The result also carries historical notes. At 23, Cobolli is the youngest champion in Acapulco since a 22-year-old Dominic Thiem won in 2016. He is the first Italian to capture an ATP title this year and, as the nation’s No. 3, will join countrymen Jannik Sinner and Lorenzo Musetti, currently ranked No. 2 and No. 5, in the Top 15.

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ATP BNP Paribas Open Masters

Bouchard: Indian Wells an ideal stage for Ben Shelton to carry U.S. hopes

Bouchard backs Ben Shelton as top U.S. hope at Indian Wells amid Paul and Fritz challenges this week

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The 2026 BNP Paribas Open arrives with main-draw action beginning Wednesday, March 4, and American men figure prominently in the conversation at Tennis Paradise. Eugenie Bouchard singles out a compact group of U.S. contenders and places Ben Shelton at the center of expectations.

Ben Shelton. His game has shown clear evolution and he often lifts his level at the biggest events. With Indian Wells regarded as the premier U.S. tournament after the US Open, the setting feels appropriate for Shelton, who already won a first Masters 1000 title in Canada last summer.

Tommy Paul. After a 2025 season hampered by injury, Paul appears to have recovered and has produced a strong start to 2026. His Delray Beach win over Taylor Fritz—the only American man to win Indian Wells since Andre Agassi in 2001—was certainly a statement about his readiness to return to the Top 10 and beyond. Back to full health in Australia, he played great to reach the second week and gave Carlos Alcaraz all he could handle over three close sets in the fourth round. If he stays healthy and consistent, Paul could be the most dangerous American in the draw.

Taylor Fritz. Local support and familiarity with the event add weight to his prospects. “Total transparency: how can i go against my man in his hometown tournament? A tournament he’s the only one of his countrymen to have won before, no less.” That hometown element and previous success at the event create a compelling backdrop for his campaign.

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Indian Wells will demand serve, return and stamina across large courts and long days. Between Shelton’s upward trajectory, Paul’s return to form and Fritz’s home-court narrative, the U.S. contingent arrives with several credible candidates to produce the best American result as the Sunshine Swing begins.

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