The US Open Mixed Doubles Championship finally introduced the revamp of the mixed doubles category on Tuesday. Thereby, stars collided and a new format was exhibited. However, can the tournament be declared a hit?

Big names fell early and unexpected teams broke through to steal the spotlight on Day 1 of U.S. Open mixed doubles play, headlining an electric opener packed with upsets and standout performances.

The No. 1-ranked Sinner, the defending champion in singles at Flushing Meadows, was supposed to compete in mixed doubles with Katerina Siniakova.