EMMA RADUCANU and Carlos Alcaraz are set to team up for the US Open mixed doubles.

The superstar duo are due to take on Jack Draper and Jessica Pegula in round one TONIGHT , meaning that both British No1s will do battle.

The revamped mixed doubles event has generated plenty of buzz, with several global superstars signed up to play.

But some of the changes have proven to be controversial, with doubles specialists in particular unhappy at largely being frozen out.

So what exactly has changed?

Well for a start, prize money has skyrocketed.

Winners of this year's event will pocket $1million (£740k) - five times what last year's champions Sara Errani and Andrea Vavassori earned.

It is also taking place in the week before the singles begins, spanning two days - with successful teams

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