Stage five featured a long and flat climb to Willunga Hill, which had to be climbed twice. In the final kilometres, Lemmen and Milan Vader worked their way to the front of the race. After countering a few pinpricks, Lemmen went into the final kilometres at the head of the group of favourites.

Vader dropped back a little, but all the work did not prevent Lemmen from sprinting to victory. The Dutchman finished fifth behind the likes of Julian Alaphilippe and British stage winner Oscar Onley. That result leaves Lemmen in sixth place in the general classification with one stage to go.

"We controlled the day pretty well and kept Milan out of the wind”, Lemmen said. "We started the second climb, Willunga Hill, in a good position. Despite some attacks, I managed to stay at the front. In the end, I didn't have enough speed in the sprint for a podium finish. I got boxed in, which slowed me down, but I can't complain about this great result”, the 28-year-old rider said.

"I've had a huge boost recently. The team has shown a lot of confidence in me. I feel their appreciation. This morning, I didn't think I could compete with the best climbers here. I am happy with the professionalism of Team Visma | Lease a Bike and my role in the team. I am so glad with this performance. I surprised myself a little. Now, I am looking forward to the final stage tomorrow. I hope to stay in the top ten. It's a stage that should suit Milan and me.”