When is US Open semi final? UK time of 2021 women’s tennis last 4 match between Emma Raducanu vs Maria Sakkari

The US Open 2021 is reaching its climax ahead of the finals weekend.

There is huge British interest in the women's draw of the tennis tournament with Emma Raducanu into the semi final at Flushing Meadows.

It is the 18-year-old's first big semi final in only her second Grand Slam, having excelled to reach the last 16 at Wimbledon earlier in the summer.

Raducanu is the first player to have made it through qualifying and reach the last 4 of the US Open - and has done it without dropping a set.

Needless to say there's plenty of home interest in Raducanu's US Open 2021 semi final against 17th seed Maria Sakkari of Greece.

While another teenager, Canadian Leylah Fernandez, is also making a name for herself in the other half of the women's draw.

The 19-year-old will play second seed Aryna Sabalenka of Belarus in the first semi final on the Arthur Ashe Stadium main court.

Here's when the semi finals will take place, what time they are scheduled to start (including UK time) and how to watch the action unfold.

When are the US Open 2021 semi finals?

The US Open 2021 semi finals in the women's draw will take place in the early hours of Friday 10 September for UK viewers.

Both semi finals are scheduled to take place in the evening session on Day 11 of the US Open, which starts from 7pm local time in New York.

Yet, due to the time difference, it means the action won't start until five hours later in the UK, taking it into Friday morning.

What time are the US Open 2021 semi finals?

For UK viewers hoping to watch Emma Raducanu in semi final action at the US Open, the time difference will mean a late night or early morning.

Raducanu has been playing in the early sessions through the US Open rounds so far, meaning her matches have featured at around 5-7pm UK time.

But the semi finals will start in the evening session, with Leylah Fernandez vs Aryna Sabalenka scheduled to start at midnight (UK time) on Thursday 9 September.

Following the conclusion of Fernandez vs Sabalenka, Emma Raducanu and Maria Sakkari will take to the Arthur Ashe court, at around 1.15am (UK time) on Friday 10 September.

US Open 2021 schedule

Following the women’s singles semi finals, the US Open 2021 final is scheduled to take place in the evening session on Saturday 11 September in New York.

This could mean it being played in the early hours of Sunday 12 September for UK fans.

• Thursday 9 September 2021 - Men’s & Women’s Wheelchair Singles Quarterfinals, Men’s & Women’s Wheelchair Doubles Semifinals, Quad Wheelchair Singles Quarterfinals, Quad Wheelchair Doubles Semifinals, Men’s & Women’s Doubles Semifinals, Women’s Semifinals
• Friday 10 September 2021 - Men’s Doubles Final or Mixed Doubles Final, Men’s & Women’s Wheelchair Singles Semifinals, Quad Wheelchair Singles Semifinals, Men’s Semifinals
• Saturday 11 September 2021 - Women’s Wheelchair Doubles Final, Men’s Wheelchair Doubles Final, Quad Wheelchair Doubles Final, Mixed Doubles Final or Men’s Doubles Final, Women’s Final
• Sunday 12 September 2021 - Men’s Wheelchair Singles FInal, Women’s Wheelchair Singles Final, Quad Wheelchair Singles Final, Women’s Doubles Final, Men’s Final

How to watch US Open 2021 semi finals on TV

Tennis fans in the UK can watch the US Open 2021 through Amazon Prime Video.

New customers can sign up for a 30 day free Amazon Prime trial with no commitment or contract to watch the entirety of the US Open 2021 in New York.

Viewers can have their pick of which tennis matches to watch over the fortnight of action being broadcast live from court side at one of the chosen Flushing Meadows venues.

Amazon Prime customers can also benefit from its wide choice of TV shows, films, documentaries and live sports screened through the streaming service.

After the completion of the trial, an Amazon Prime Video subscription costs £7.99 per month and offers free next day delivery on thousands of items from the Amazon website.