Russell cites unexplained straight-line speed loss as Mercedes struggle at Spa

George Russell reports significant straight-line deficit at Belgian GP qualifying

Mercedes driver George Russell said he faced a persistent, unexplained loss of straight-line speed during qualifying for the Belgian Grand Prix at Spa-Francorchamps, leaving him 0.508 seconds slower than team-mate Kimi Antonelli and describing the situation as a serious issue the team is working to resolve.

Russell qualified fourth for the Grand Prix and reported that more than 75% of his deficit to Antonelli came from the power unit deployment on the straights. He said he remained competitive through the corners but was losing between 0.2 and 0.6 seconds on the straights, and that his focus in the preceding 36 hours had been exclusively on recovering straight-line speed.

Mercedes trackside engineering director Andrew Shovlin confirmed Russell suffered from poor deployment into the final chicane, costing him grid positions, and said the team is prioritising investigation into an unexplained loss that cannot be attributed solely to driving style.

Mercedes acknowledged that mid- and high-speed corner handling required corrections that reduced available battery deployment late in the lap, a pattern that had been partially improved over the weekend but left an unexplained straight-line discrepancy remaining.

Liberal News Analysis: What Does This Development Mean?

Russell’s comments and Mercedes’ technical briefing indicate a combination of reduced deployment in the final sector and remaining unexplained losses on the straights. Team feedback pointed to earlier steering corrections in the middle sector increasing electrical energy use, while the team continued to probe a separate, unexplained straight-line slowdown that has persisted into qualifying.

McLaren reported similar deployment splits across its cars, with team principal Andrea Stella noting minor deviations in power-unit operation affecting straight-line performance for Lando Norris and Oscar Piastri, paralleling the pattern seen between Antonelli and Russell.

Drivers and team representatives also discussed how the current power-unit energy distribution changes circuit characteristics at Spa, with lower mid-sector electrical deployment reducing corner entry speeds and altering the feel of high-speed turns like Pouhon and Eau Rouge.

Development details

Russell said portions of his lap were competitive through corners and that he even had laps where he lost an additional 0.15 seconds on the straight for reasons he could not explain. He added he did not believe the issue was solely the power unit, but acknowledged the team was working intensively to find the cause.

Antonelli took pole with his sixth pole position in 10 races, while Max Verstappen qualified second and Lando Norris set third before a grid penalty. Russell entered the race 25 points behind Antonelli in the standings.

Officials noted that the new power-unit regulations and the current balance between internal combustion and electrical deployment have changed some circuits’ character, particularly at long tracks like Spa, where batteries are drained on the long runs and the middle sector is run largely on the internal combustion engine.

Quick Glance: What You Need to Know

• George Russell reported a 0.2–0.6s straight-line speed loss in qualifying at Spa-Francorchamps.
• Mercedes is investigating poor deployment into the final chicane and an unexplained straight-line deficit.
• Kimi Antonelli took pole, with Russell qualifying fourth and remaining 25 points behind Antonelli in the standings.