France, Aug. 20 -- Defending champions Sara ErraniandAndrea Vavassori moved into Wednesday's semi-finals of the US Open's new look mixed doubles event after winning their last-16 and quarter-final matches without dropping a set.

They dispatched the second seeds Elena Rybakina and Taylor Fritz 4-2, 4-2 and then beat Karolina Muchova and Andrey Rublev 4-1, 5-4 on Tuesday at the Billie Jean King Tennis Centre in New York.

Errani and Vavassori won the 2024 title afterbattling their way through five ties against specialist doubles pairs to lift a prize that has been awarded at the US Open since 1887.

Last February, executives at the United States Tennis Association, who organise the US Open, declared a revamp of the tournament.

They cut th...