George Russell finished eighth in qualifying at the Sepang circuit, marking his lowest result of the 2026 Formula One season. The British driver admitted concerns about the major updates introduced by his team, Mercedes. His time was nearly three-quarters of a second slower than Max Verstappen's pole position time. This result came as Mercedes unveiled its most significant set of upgrades in several months. Andrea Kimi Antonelli, Russell's teammate, secured fourth place, about a quarter of a second ahead of him. Russell said he couldn't determine how much the new parts contributed to the W17's performance issues. This was only the second time this season that no Mercedes car had finished in the top three of qualifying. Russell was surprised by the result, especially after his strong performance in Bakou and Antonelli's dominance in the final qualifying session. When asked about the drop in performance, Russell said he didn't have a clear explanation. Russell noted that the abrasive surface of the Sepang track, which used to make lap times about six or seven seconds faster seven years ago, seemed to affect Mercedes more than other teams. He said, "It's the same for everyone. However, it clearly affects us more than the others." This observation matches Toto Wolff, who mentioned after qualifying that Mercedes was encountering behaviors on its car that it hadn't seen this season. Mercedes made significant changes to the W17 for Sepang, especially at the floor and rear suspension. However, without a direct comparison to the previous setup under the same conditions, Russell said it was extremely hard to assess the effectiveness of the new parts. He added, "This is the major point of question. If we had been able to make a direct comparison between the two configurations, it would have been fantastic for understanding. But it's precisely one of the challenges of this sport." Russell used Bakou as an example to show how hard it is to draw conclusions from a single weekend. He said, "If we had installed these updates last week, even if they had made the car less competitive, we would have probably still taken the pole and said they were fantastic." He also acknowledged that the opposite could be true at Sepang, as there's no certainty that the old W17 would have performed better. The data from wind tunnels suggested an improvement in line with Mercedes' expectations. However, Russell stressed that only on-track performance can truly judge an update's effectiveness. He said, "The figures seem perfectly correct and correspond to our expectations. But in our sport, we obviously have to rely on lap times and not just what the data says. And the result wasn't that." Russell did not criticize the new parts after a single qualifying session but admitted the session was a real failure for a team that had been consistent all season. He noted, "As a team, we haven't experienced a bad race this season and clearly, these qualifications have been very bad for us." A five-place penalty for Isack Hadjar will allow Russell to start seventh. Russell remains hopeful about overtaking, saying, "I think a lot will happen tomorrow. Tyre degradation is enormous and race pace will be crucial. Even though today was a real disappointment, everything isn't decided here." With 66 points behind Antonelli in the championship, Russell needs to avoid losing more ground. After his impressive return to the title race in Bakou, Sepang now represents an important test for his ambitions and for the new updates of Mercedes.