One day before the first rest day a team time trial of 28 kilometres is scheduled. The riders start in Vannes and will finish in Plumelec. A team time trial is always hard for the riders and on the hilly course they won’t have any time to recover. For the GC contenders this is an opportunity to gain time on their opponents or at least they have to make sure not to lose any time. Lotto Soudal sports director Bart Leysen explains.

"The distance of the team time trial – 28 kilometres – is not too long, but the course is very hilly, with three climbs," he said. "The last one is a climb of 1.7 kilometres leading towards the finish line in Plumelec. There is a big risk that some riders will make it too hard for their teammates. In each team there is a big difference between the best and least strong rider uphill, so you need to try to keep as many riders together as possible and after the climbs you need to raise the tempo all together as high as you can. You need to make sure not to lose any riders on the first climb. There will be teams with good intermediate times, but then will explode in the last two kilometres towards the finish.”