Tennis Channel App Subscribers Surged with ‘Sunshine77’ Promotion  Coverage Continues for the “Sunshine Double” March 17-29 at the Miami Open, featuring Indian Wells Champions Jannik Sinner and Aryna Sabalenka LOS ANGELES, March 19, 2026 (GLOBE NEWSWIRE) -- Tennis Channel saw its highest viewership ever this year at the BNP Paribas Open. The tournament, highly regarded as the 5th Grand Slam, increased 39% from last year and drew record high engagement on social media and tennis.com. TC Live delivered ano ...