This list will be updated as changes eventuate (Dolgopolov currently without a racquet sponsor)
Frances Tiafoe: Changed from Wilson racquets to Yonex (great move for him imo)
Caroline Garcia: Changed from Babolat to Yonex. Unsure of whether she has retained her Nike apparel deal or whether she will also wear Yonex brand clothing. (bad move for her imo and will play far worse with her Yonex racquets rather than the Pure Aeros that suited her game).
Borna Coric...
Official 2017 List of Pro Sponsorship Changes
Frances Tiafoe: Changed from Wilson racquets to Yonex (great move for him imo)
Caroline Garcia: Changed from Babolat to Yonex. Unsure of whether she has retained her Nike apparel deal or whether she will also wear Yonex brand clothing. (bad move for her imo and will play far worse with her Yonex racquets rather than the Pure Aeros that suited her game).
Borna Coric...
Official 2017 List of Pro Sponsorship Changes