Viviani topped Sonny Colbrelli (Bahrain-Merida) and Michael Schwarzmann (Bora-Hansgrohe) in the dash to the line in Payerne after the early breakaway and a number of later attacks were all brought to heel.
Fabio Felline (Trek-Segafredo) kept his race leader's jersey for the fourth straight day, still with eight seconds on Max Schachmann (Quick-Step Floors) and Jesús Herrada (Movistar).
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