Live Streaming for the 2018 ATP World Tour and WTA events in Singapore, Basel and Vienna can be found below.
Link: TennisTV (best quality)
Link: WTA TV (best quality)
Link: EuroSport (Europe)
Link: SkySports (Europe)
Link: TSN (Canada)
Link: TVA (Canada)
Link: ESPN (US Only)
Link: Tennis Channel (US Only)