Guadalajara semi-finals, 19 September: Jovic defends her title, Samsonova runs on fumes

Both semi-finals in Guadalajara arrive with the same question attached to different players: how much is left in the legs. Iva Jovic, still 18, is defending the title that made her name, and she has never lost a match at this tournament. Cristina Bucsa is in the last four of both the singles and the doubles, which is flattering in a press release and heavy in the thighs. Later in the night, Liudmila Samsonova walks out having spent nearly three hours beating Kayla Day and another long evening beating Marta Kostyuk, and Peyton Stearns waits for her with the freshest legs in the building.

Altitude does odd things to a tennis match. The ball flies, the first strike is rewarded, and yet the topspin forehand sits up higher than anywhere else, which is why two very different types of player have survived here. Two matches, then, and I want to talk about both:

23:00 — Bucsa — Jovic
00:30 — Samsonova — Stearns

Times are UTC.

Cristina Bucsa — Iva Jovic

Jovic has not lost a match in Guadalajara in her life, and that perfect 7-0 record is the whole storyline: this is where she broke through, and she has come back to protect it. She started nervously against Zeynep Sonmez, let a lead evaporate and needed a tie-break to settle herself, then played her cleanest tennis of the week in dismissing Magdalena Frech 6-2 6-1. She was honest enough about the scoreline afterwards: "The score definitely doesn't reflect how hard that match was" (Guadalajara Open). Of Bucsa she simply said it would be a very complicated match, which is either politeness or good scouting.

Bucsa has been quietly excellent. She beat Bianca Andreescu without ever trying to out-hit her, ground past Panna Udvardy, then handed Sara Bejlek a bagel and held on when the Czech raised her level in the second. "In the first set I played very well, I didn't miss anything," she said afterwards (Guadalajara Open), and the more interesting part was what came next: when Bejlek went ahead, Bucsa lengthened the rallies instead of shortening them. Mexico seems to agree with her — she already won a singles and a doubles title in the country this season, and she says the crowd support gives her extra strength. There is no head-to-head to lean on, and Bucsa's hard-court season has been modest, a shade under half her matches won in 2026 against Jovic's two-thirds.

The risk is the schedule. Bucsa played her quarter-final and then a doubles semi-final on the same day, complete with a rain delay and a tense first set, and she is into that final too. Nothing about her movement suggests trouble — the wrist problem that cost her the grass season has not shown up here — but a long day at the site is a long day at the site.

Jovic at 1.278 looks about right and still short: she creates her own pace, takes the ball early, and Bucsa's variety only works if her legs let her reset the point. I lean to Jovic, but I doubt this is the walkover the handicap implies — Bucsa redirects pace better than anyone left in the draw, and the +5 games side of that spread appeals to me more than the favourite's −5. Two sets for Jovic, with one of them going to the wire.

Liudmila Samsonova — Peyton Stearns

Samsonova has won the best match of the tournament and paid for it twice over. Beating Kostyuk, ranked tenth in the world, 4-6 6-2 7-5 after losing the opening set and surviving a break down in the decider was the performance of her week; getting past Kayla Day 7-6(4) 2-6 7-6(5) beforehand was closer to an ordeal. "When you feel you're close, it's easier to keep believing," she said after the Kostyuk win (Guadalajara Open), and the striking thing was her restraint — a lost first set did not send her chasing winners, it made her patient.

Stearns has had the tidier week and, to my eye, the more useful habit. She brushed Emiliana Arango aside, came back from a bad patch to beat Diane Parry 6-2 7-5, and then out-stubborned Sloane Stephens 7-6(6) 6-4 in a scrappy quarter-final neither player controlled. She is not playing error-free tennis; she simply forgets her errors faster than her opponents forget theirs. The altitude suits her, as she explained early in the week: "I love playing at altitude, my forehand seems to kick up a bit more" (Guadalajara Open). They have never met, and neither has done much on hard courts this year — Stearns a little above water, Samsonova a little below.

The shape of it is clear enough. Samsonova has more raw power and a bigger first strike, and on a quick court at height she can end points before Stearns is ready to run. Stearns wins by making her hit one more heavy ball on the move, especially high to the backhand, because Samsonova is a different player when she has to rebuild her balance rather than swing from a set position.

The market makes Samsonova the favourite at 1.684 and I understand why, but fatigue is the loudest fact in this match: five hours of tennis in two nights against a woman who has barely broken sweat by comparison. Stearns at 2.232 is the sort of price I would happily be wrong about. I expect a long, awkward, three-set night — the 21.5 games total looks low for these two, and the underdog with two games in hand is the side I find honest.

A title defence, a tired favourite and one very stubborn American

The day turns on two simple things: whether Bucsa's doubles run has cost her the legs she needs to make Jovic uncomfortable, and whether Samsonova has anything left after the best win of her week. Jovic defending the title that launched her at 18 is the storyline of the tournament; Stearns refusing to lose sets she is losing is the one I have enjoyed most.

I would not miss the second semi-final if forced to choose — it has the look of a match decided in the third set by whoever is still moving properly. The specific calls belong to the AI cappers on the match pages, and they are far less diplomatic about it than I am.