De Minaur defended his Mexican Open title in Acapulco on Saturday before scheduling an early-morning flight to support her on Sunday.
Boulter has had a flying start to the 2024 season and the victory over Kostyuk guarantees she will break into the top 30 for the first time.
The British number one will take on Ukraine’s Marta Kostyuk for her first WTA 500 title.
The Australian defeated Casper Ruud 6-4 6-4.
Boulter beat Emma Navarro 6-3 6-1 in just over an hour.
Draper left the court 4-0 down in the final set.
The British number one beat Donna Vekic 6-4 6-3 to add to the scalp of Beatriz Haddad Maia in San Diego.
The Russian protested his innocence.
Rublev protested against the disqualification and denied a claim that he swore at the line judge
The British number two beat Miomir Kecmanovic 6-2 6-2 at the Mexican Open
The 21-year-old is set to compete at the Miami Open in March
The three-time grand slam champion has indicated he is heading into the final months of his career.
The deal with the Public Investment Fund is Saudi Arabia’s latest involvement in sport
Katie Boulter came from behind to beat second seed Beatriz Haddad Maio in the San Diego Open.
The 36-year-old was beaten 6-2 6-4 by Ugo Humbert in Dubai.
Murray says he wants to play at the Olympics, but is ‘likely’ to stop after the summer
The former world number one fell to a 6-2 6-4 defeat.
Murray was beaten 6-2 6-4 by the in-form Humbert after dropping his latest hint about his future
The 36-year-old has been speaking openly about his retirement from tennis
The 36-year-old has been speaking openly about his retirement from tennis.
Everything you need to know ahead of the Dubai Open last 16 match
Andy Murray hinted he was heading into the “last few months” of his tennis career after battling from a set down to beat Denis Shapovalov in Dubai to secure his second win of 2024.
Dan Evans meanwhile fell to world No 17 Ben Shelton in three sets
The Scot secured an impressive first round win over Denis Shapovalov in the UAE
Murray fought from a set down to secure his second victory of 2024 and reach the last-16 of the Dubai Open
Sharapova had struggled with chronic shoulder problems for some time.
Norrie, the defending champion, struggled physically in the Brazilian heat as Navone, playing in his first ATP semi-final, pulled away to win 6-4 6-2.
The British number one secured a 6-1 3-6 6-2 victory over Thiago Seyboth Wild to head into the last four.
The British number one beat Tomas Barrios Vera 6-1 6-1.