Shelton set to ditch On weeks after Swiss brand signs Mbappe
- Shelton is reportedly moving from On to New Balance in January.
- He is the first major departure since Mbappe invested in On.
- On retains prominent players including Iga Swiatek and Flavio Cobolli.
Ben Shelton is reportedly set to leave On for New Balance in January, making him the first major athlete to depart the Swiss sportswear brand since Kylian Mbappe acquired a minority stake. The switch adds to a series of high-profile changes in tennis sponsorships and comes as On…