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Tennis9 April 2026·Lumio Sports Editorial

'My Agent and I Were Working From Different Spreadsheets': Alex Rivera on Running a Professional Tennis Career

ATP #67 Alex Rivera spent five years managing his career from a combination of the ATP website, his agent's spreadsheets, and his own memory.

Five Years of Fragmented Information

Alex Rivera sits at ATP #67, a ranking that places him firmly in the professional touring tier — high enough to gain direct entry into every Masters 1000 event, but not high enough for the scheduling flexibility that the top twenty enjoy. At this level, every tournament entry decision, every training block and every commercial commitment has ranking implications that ripple through the next six months of his career.

For five years, Rivera managed those decisions from a combination of the ATP website, his agent's spreadsheets, his coach's notes and his own memory. "My agent had one version of my schedule on his laptop. My coach had his own notes about which tournaments suited my game. My physio tracked my body in a separate app. I was the only person who talked to all three of them, and I was supposed to be focusing on tennis."

The fragmentation was not anyone's fault. It was structural. Professional tennis had never offered a platform that connected the ranking data, the physical performance data, the commercial data and the scheduling decisions into one place. Each member of Rivera's team was doing excellent work within their own silo. The problem was that no one could see the full picture.

The Points Expiry Calendar That Changed an Entry Decision

Rivera adopted Lumio Tennis in January 2026, during the Australian hard court swing. The first feature that changed a real-world decision was the points expiry calendar.

"I'd earned 180 points at a 500-level event the previous February," Rivera explains. "Those points were due to expire in three weeks. My plan was to skip the corresponding tournament this year and play a 250 in South America instead, because I had a good record there and thought I could pick up easy points."

The Lumio dashboard showed him the full ranking impact of both scenarios. Playing the 250 and winning the tournament — his best-case outcome — would net 250 points but still result in a net loss of 30 points once the 180 expired. Playing the 500 and reaching the quarter-finals — a realistic outcome based on his hard court form — would net 100 points and partially offset the expiry, while a semi-final run would leave him net positive.

"But the key insight was what the expiry did to my ranking in combination with other players' results. The platform showed me that four players ranked just below me were entering the 500. If they performed well and I wasn't there, I could drop four or five places. At my ranking, five places is the difference between being seeded at certain events and not being seeded."

Rivera entered the 500 event, reached the quarter-finals, and maintained his ranking position. "Without the platform, I'd have gone to South America and dropped to around 72. The scheduling decision would have cost me seedings for the next two months."

The Physio Dashboard That Became Visible to the Coach

Rivera's physio, Maria Santos, had been tracking his physical data in a separate system for three years. Training loads, recovery metrics, treatment logs and injury history were all meticulously documented — but only visible to Santos.

"Maria would tell my coach, 'Alex's shoulder load is high this week, reduce the serve volume in practice.' But my coach, Carlos, had no context for what 'high' meant. He was taking Maria's word for it, which he trusted, but he couldn't make his own judgements because he couldn't see the data."

When Santos began logging data into Lumio, the physio dashboard became visible to Carlos through his coach's briefing. For the first time, he could see the quantified load data alongside the training plan he was designing.

"The first week Carlos had access, he restructured the entire training block," Rivera says. "He moved the high-intensity court sessions to Monday and Tuesday, when my recovery metrics were best, and shifted the tactical video work to Thursday, when Maria's data showed I was typically at my highest fatigue. He'd wanted to do that for years but didn't have the numbers to justify the change."

Santos confirms the impact. "Carlos and I used to have a conversation every morning about Alex's body. Now we both look at the same dashboard before we talk. The conversations are more specific because we're starting from the same information."

The Agent Briefing That Aligned the Team

Rivera's agent, Daniel Park, manages twelve professional tennis players. Before Lumio, Park tracked Rivera's commercial obligations, contract deadlines, appearance fees and scheduling commitments in a spreadsheet that was updated weekly.

"Daniel's spreadsheet and my understanding of my own schedule didn't always match," Rivera admits. "He'd book me for a sponsor appearance during a week I thought was a training block. I'd enter a tournament he thought I was skipping. We'd catch the conflicts eventually, but sometimes it was last minute."

Lumio's agent briefing provides Park with a daily summary of Rivera's schedule, ranking position, upcoming entry deadlines and commercial obligations. Critically, it cross-references the tournament calendar with the sponsorship obligation calendar, flagging conflicts before they become problems.

"In February, the platform flagged that a sponsor appearance in Dubai conflicted with my entry deadline for Indian Wells. Daniel thought the appearance was Wednesday. The entry deadline was Tuesday. If I'd been in Dubai on Tuesday, I'd have missed the deadline and lost my direct entry into a Masters 1000."

Park adjusted the sponsor appearance to Monday. Rivera filed his entry on time. "That's a £200,000 potential earnings event I could have missed because of a one-day scheduling conflict that nobody spotted in the old system."

The Morning Ritual

Four months into using Lumio, Rivera describes a new morning ritual that has replaced the fragmented communication of the previous five years.

"I wake up and listen to my briefing. Carlos listens to his. Maria listens to hers. Daniel reads his. By the time we're all in the same room — or on the same call — we've all consumed the same information from our own perspective. The conversations start at a higher level because nobody's playing catch-up."

He reflects on the five years before. "I thought the way we were doing it was normal. Everyone on tour does it that way. But once you have one platform where everything connects, you realise how much time and energy you were wasting on information management instead of tennis."

Rivera is currently on a six-match winning streak, his best run since breaking into the top 100. He is careful not to attribute it to any single factor. "But I'm making better decisions about which tournaments to play, my training is better structured because my coach and physio are aligned, and my agent and I haven't had a scheduling conflict in four months. That's not nothing."

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