Puck Pieterse finished fourth after another selective opening stage suited to the strongest all-round riders.
Wiebes survives as Kopecky and Kool are dropped
Although officially classified as a flat stage, the 137-kilometre route contained four categorised climbs and a final 2.5-kilometre ascent averaging 4.6 per cent. The repeated changes in gradient gradually reduced the peloton and removed several potential stage winners. Charlotte Kool was distanced on the Cote de Villars-le-Comte, while Lotte Kopecky lost contact on the following Cote de Vulliens.
Kopecky had been another leading option for SD Worx if the finish proved too difficult for Wiebes, but the European champion continued to survive each acceleration and reached the decisive climb with the front group.
AG Insurance – Soudal attempted to take control for Le Court-Pienaar in the closing kilometres. Shari Bossuyt moved to the front before Le Court-Pienaar attacked with 1.5 kilometres remaining, although the move was quickly absorbed.
Celia Gery then tried to anticipate the favourites before Van der Breggen lifted the pace for SD Worx. Vollering made the next acceleration, but her move ultimately provided Wiebes with the ideal launchpad.
The four-rider breakaway was caught with six kilometres remaining after spending most of the stage at the front. Idoia Eraso and Maud Rijnbeek had initiated the move before Nikola Noskova and Oceane Mahe bridged across, with the quartet later building an advantage of around six minutes.
Mahe secured the first polka-dot jersey after taking maximum points on the opening two categorised climbs. Noskova attacked over the Cote de Vulliens before Amanda Spratt joined Eraso and Rijnbeek in the chase, eventually restoring a four-rider group at the front.
Crashes disrupt nervous opening stage
Several crashes added to the tension around the rolling and technical Lausanne circuit. Zoe Backstedt, Le Court-Pienaar and multiple Fenix – Premier Tech riders were delayed by an early incident. Christina Schweinberger suffered pain in her wrist and later struggled to remain in contact after having the injury strapped.
Laura Tomasi, Lotte Claes and riders from Team Picnic PostNL were involved in another crash. Tomasi underwent an on-road concussion assessment before eventually becoming the first rider to abandon the 2026 Tour.
Marlen Reusser also faced a late scare when a Movistar teammate crashed in front of her on a descent. The Swiss GC contender was delayed while dealing with a mechanical issue but returned to the peloton with help from two teammates. Dominika Wlodarczyk and Letizia Paternoster then crashed inside the final two kilometres as the fight for position intensified.
Wiebes avoided the trouble and answered every question posed by the climbing route, taking the stage ahead of Le Court-Pienaar, Vollering and Pieterse to begin the Tour in yellow.