At the 2025 Madrid Open, Elena Rybakina stopped play to confront the chair umpire after a Zheng Qinwen serve was ruled in by the Hawk‑Eye electronic line‑calling system despite a visible ball mark on the clay. On court she said, "This is not a joke. The system is wrong. This is not a joke. It is not touching. It is absolutely wrong," and went on to win the match in three sets.
Later, Rybakina described the moment as costly. "It’s kind of a stolen point. I understand it was her serve and she was serving really well, but it’s really frustrating," she said after the match, underlining how a single call on clay can change momentum. That frustration was echoed by other players at the Madrid event: one year earlier Alex Eala raised a similar complaint after her defeat to Iga Świątek, saying, "Can you make it make sense?" Eala had pointed to a mark on the clay that she said showed Świątek’s serve was out, while the electronic system called it in.
The dispute in Madrid sharpened an ongoing debate about automated line calling on clay. Clay‑court tennis has traditionally relied on human line judges and chair umpires inspecting ball marks in the surface to decide whether a shot was in or out; the article says electronic line calling on clay can disagree with what players can see on the court. The Hawk‑Eye system is now used at three of the four Grand Slams and across all men’s and women’s tour events above the 250 level. The Australian Open replaced line judges with electronic line calling in 2021, the U.S. Open did the same in 2022, and Wimbledon followed suit last year, while the French Open has retained line judges and continues to use ball marks to determine whether shots are in or out.
The immediate weight of the Madrid incident went beyond one disputed point. It reopened tensions between what the electronic system reports and the physical evidence players can point to on clay. Several players and commentators pointed to obvious marks on the surface that appeared to contradict the machine review, a gap that is especially stark on a surface where a ball leaves a visible impression. The issue is not new to Madrid: Eala’s complaint a year before shows a pattern at the same tournament of players questioning electronic decisions on clay.
A headline reaction came from Alexander Zverev, who warned there was a "defect in the system" and said, "I will talk to the supervisors, I will talk to the ATP because, as I said, this is not normal. For a mistake to happen like this, yes, one or two millimeters I understand, but four, five centimeters is not normal." His comments put a spotlight on measurable discrepancies: when players see marks a few millimeters away from a line and the system calls the ball in, the contrast is immediate and, for many, unacceptable.
At court level the dispute is concrete and procedural at once: players point to ball marks they can see with their own eyes; an increasingly automated review system answers with coordinates and pixels. The clash is most acute on clay because the surface documents the ball’s contact in a way that grass and hard courts do not. For readers following the Madrid draw, El‑Balad has covered the match developments as they unfolded (see Elena Rybakina tested in Madrid as Zheng Qinwen snatches first set and levels the match — and the next opponent lines (see Anastasia Potapova faces Elena Rybakina in Madrid: odds, simulations and pick —
The consequential question now is simple and immediate: will tournament supervisors and the tour respond to repeated player complaints about clear clay marks disagreeing with electronic calls? If the answers from players like Rybakina and Eala and the warning from Zverev carry weight, the Madrid incidents could force a technical and policy review of how automated systems are used on clay — and whether visible ball marks should regain a decisive role in resolving disputes.
