After Pätz joined the Tirinzoni rink the following season, Winklehausen was invited to be their alternate at the 2018 European Curling Championships. The Swiss team claimed the silver medal after going on an unbeaten 9–0 run to finish top of the Round Robin, before defeating Germany 6–4 in the semi-final, and falling 5–4 to Sweden's Anna Hasselborg in the final. She was also Tirinzoni's alternate at the 2019 World Women's Curling Championship in Silkeborg, Denmark. The team got off to a shaky start posting a 2–3 record in their first 5 games before winning 6 in a row to secure their playoff spot and went on to finish the round robin with a 8-4 record and 4th place in the standings. Tight victories over China in the qualification game, and South Korea in the semi-final set up a repeat of the European Championship final against Hasselborg and Sweden. They were able to turn the tables on Sweden, with Pätz making a draw to the four-foot in the extra end for an 8–7 win which meant they were crowned the 2019 world champions.