Tiafoe vs. Shelton: the all-American semifinal will be decided on the lefty's backhand
Ben Shelton arrives at Friday night's semifinal against Frances Tiafoe with a precise technical edge. Arthur Ashe is forecast dry for the night session, low humidity after the first week's storms. Those are the conditions where the ball flies, and Shelton is the player left in the draw who benefits most. In the quarterfinals against Carlos Alcaraz, won 6-7(5), 6-1, 6-3, 1-6, 7-6 in four hours and twenty-eight minutes, he closed it out with a 235 km/h ace. Friday's question is how many rallies Tiafoe can open.
The first serve against the return position
Against Alcaraz, Shelton held serve at minimal cost, closing out service games in two or three shots for most of the match. The pattern is the usual one: the lefty slider out wide on the ad side to open the court, then the forehand into the short angle. Tiafoe returns from several meters behind the baseline and has the reflexes to get even the heaviest first serves back in play, but from there the return comes back short, and that's the ball Shelton steps into the court on.
The other side of the problem is Tiafoe's serve. In the quarterfinals against Alex Michelsen he stayed under 40% first serves for three full sets, and survived by saving break points over and over rather than by serving well. Against Michelsen that percentage cost him two sets and little more. Against a returner who attacks the second serve and moves straight into the court, it costs the match. If Tiafoe serves Friday the way he served Tuesday, no tactical plan will hold up.
The lefty's backhand, and who gets there first on the short ball
The target is Shelton's backhand. Andy Roddick flagged it back in April, when the American moved onto clay: there, the serve stops handing him free points, the opponent has more time to find the gaps, and Shelton ends up having to redirect balls he can't extend his arm on. On New York's fast hard courts the hole shows less because the serve covers for it, but in extended rallies it's the same hole. And here's a detail we'd add to Roddick's analysis: Shelton's backhand slice comes out short and invites the opponent into the court.
Tiafoe has the tools to exploit it. His slice stays low and deep, he plays tight angles that force the lefty to chase on the backhand side, and at net he has hands few in the draw can match. He's the player who needs to jump on the first short ball available instead of waiting for the error, because in a long, neutral rally Shelton hits with more weight.
Whoever gets to that ball first wins. Shelton gets there off his serve, Tiafoe by building the point.
Recovery, the variable no one controls
Both quarterfinals were played the same Tuesday, but in two different worlds. Tiafoe finished hours earlier, four hours and thirty-eight minutes rallying back from two sets down and 0-3 in the fifth. Shelton took the court for the night session and closed it out at 3:33 in the morning, the latest a match has ever finished in the tournament's history. From there to Friday night, that's roughly three days for Tiafoe and two and a half for Shelton, with a night's sleep to rebuild in between. It's not the gap that decides a semifinal, but it matters in a fifth set, and Tiafoe's twenty-eight years don't recover the way Shelton's twenty-three do.
Shelton starts as the favorite, slightly. He leads the head-to-head 3-1 (they split their two meetings in New York, him in four sets in 2023, Tiafoe in 2024), holds serve at lower cost, and Friday night's dry air works in his favor. The counter-argument is numerical: if his first-serve percentage drops below 60%, his backhand ends up inside the rally too often and the better plan becomes Tiafoe's, who just proved he can win a match at this level while serving poorly. Above 65%, the semifinal ends in three sets. The winner plays Sunday for the first American men's Slam title since Roddick, US Open 2003.
