Jannik Sinner may be the reigning Australian Open champion and one of the most consistent players on the ATP Tour, but even at the very top of the game, improvement remains a constant pursuit. After beginning his Australian Open title defence with a dominant yet abbreviated first-round victory over France’s Hugo Gaston, the Italian admitted he is still adjusting to recent changes in his serve and does not yet feel completely comfortable with them.
Sinner, currently ranked world number two, looked firmly in control from the opening stages of the match. He raced through the first set 6-2 and then tightened his grip even further in the second, cruising to a 6-1 lead. Just as the contest appeared to be heading toward a routine straight-sets conclusion, Gaston unexpectedly retired, bringing the match to an early end. While the circumstances of the win were unusual, Sinner’s level of play left little doubt about his superiority on the day.
Despite his comfortable progress into the next round, Sinner was candid in his post-match assessment, particularly when discussing his serve. The Italian enjoyed a superb 2025 season statistically, leading the ATP Tour in the percentage of service games won, with an impressive success rate of 92%. However, numbers alone do not tell the full story, and Sinner believes there is still significant room for improvement in this crucial area of his game.
Reflecting on the adjustments he has made since his US Open final defeat to Carlos Alcaraz last September, Sinner explained that his serve has been a key focus in training. Rather than being satisfied with what has already brought him Grand Slam success, he and his coaching team identified the serve as an area where small refinements could make a major difference, especially in the tightest matches against elite opponents.
According to Sinner, the changes involve subtle but important tweaks to both the motion and rhythm of his service action. Previously, he felt his serve started too quickly, which sometimes affected consistency and timing. By slowing the initial phase of the motion, he hopes to achieve better balance, smoother mechanics, and greater control under pressure. While the adjustment has shown promise, it is still very much a work in progress.
“At times I still lose it,” Sinner admitted, acknowledging that the serve is not yet a shot he fully trusts in every situation. This honesty highlights the fine margins at the highest level of professional tennis, where even minor technical uncertainties can influence confidence during critical moments. For Sinner, developing a serve he feels completely safe with is essential if he is to continue competing for major titles year after year.
The Italian emphasized just how vital the serve is in modern tennis, describing it as one of the most important shots in the game—if not the most important. A reliable serve can provide free points, relieve pressure during tough service games, and set the tone for aggressive baseline play. For a player like Sinner, whose game is built on powerful groundstrokes and relentless baseline pressure, an improved serve could elevate his performance even further.
Sinner’s comments also reflect a broader mindset that has defined his rapid rise to the top of the sport: constant self-evaluation and a willingness to adapt. Despite already winning multiple Australian Open titles and establishing himself as one of the most feared players on hard courts, he continues to search for marginal gains. This approach has become increasingly common among the world’s best athletes, who understand that long-term success depends on evolution rather than complacency.
His first-round performance in Melbourne offered glimpses of how effective the revised serve could become. Although the match ended prematurely, Sinner was composed, accurate, and confident on serve for much of the contest. He consistently put pressure on Gaston, combining strong serving with sharp returning to dominate rallies and dictate play.
Looking ahead, Sinner knows tougher tests await as the tournament progresses. Facing higher-ranked opponents will demand not only technical excellence but also mental assurance, particularly when matches are decided by a handful of crucial points. Developing full trust in his serve will be a key factor in navigating those moments successfully.
For now, Sinner appears content with gradual progress rather than instant perfection. He understands that meaningful technical changes take time to settle, especially under the intense spotlight of a Grand Slam. His willingness to be patient and honest about the process may ultimately prove just as valuable as the changes themselves.
As the Australian Open unfolds, fans and analysts alike will be watching closely to see how Sinner’s serve evolves and whether it becomes the weapon he believes it can be. If the adjustments pay off, they could play a decisive role in his pursuit of yet another major title and further cement his place among the game’s elite.
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