It"s a Royal Mexican wave: Wills and Kate join in the Wimbledon fun as Andy Murray powers into the Olympic men"s singles semi-finals

It's a Royal Mexican wave: Wills and Kate join in the Wimbledon fun as Andy Murray powers into the Olympic men's singles semi-finals

Duke and Duchess of Cambridge joined president of the International Tennis Federation Francesco Ricci Bitti to cheer Murray to victory

Kate wore recycled Stella McCartney dress that she wore two weeks ago at the National Portrait Gallery

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UPDATED:

14:50 GMT, 2 August 2012

The Duchess of Cambridge resumed her seat in the Royal Box to cheer on Andy Murray on to victory in the men's singles quarter finals against Nicolas Almagro of Spain at Wimbledon today.

After showing her emotion at Murray's Wimbledon defeat earlier this year, Kate seemed overjoyed to be returning to Centre Court to support the British favourite.

Kate and her husband William got so into the supportive spirit that they even joined in with a Mexican wave that ran through the crowd during the match.

Prince William and Kate joined the crowd in doing the wave at the match between Andy Murray and Nicolas Almagro at the All England Lawn Tennis Club at Wimbledon today

Prince William and Kate joined the crowd in doing the wave at the match between Andy Murray and Nicolas Almagro at the All England Lawn Tennis Club at Wimbledon today

The Duke and Duchess of Cambridge really got into the spirit of support Andy Murray in the men's singles quarter finals at Wimbledon today

The Duke and Duchess of Cambridge really got into the spirit of support Andy Murray in the men's singles quarter finals at Wimbledon today

The young Royals were great sports and got involved with the crowds cheering on Andy Murray at the match today

The young Royals were great sports and got involved with the crowds cheering on Andy Murray at the match today

Kate looked as impossibly chic as
ever in an electric blue 515 Stella McCartney knee-length dress which she teamed with her new favourite Smythe navy blazer with gold buttons that she has been spotted wearing to two Olympic events already this week.

Known for her wardrobe choice recyclables, Kate recently wore the blue dress to the opening of the The Road To 2012: Aiming
High exhibition at the National Portrait Gallery, which she teamed with a 49,000 gold hooped necklace.

Andy Murray beat Nicolas Almagro at the All England Lawn Tennis Club at Wimbledon with Kate and William cheering him on

Andy Murray beat Nicolas Almagro at the All England Lawn Tennis Club at Wimbledon with Kate and William cheering him on

The young Royals seemed to be enjoying the sunny day on Centre Court and, as keen tennis fans, they seemed delighted at being able to
watch such a nail-biting match live.

The couple were accompanied by the president of the International Tennis Federation, Francesco Ricci Bitti, and were welcomed with a round of applause from the stands.

The Duke and Duchess looked relaxed as they chatted to each other between the points, and seemed happy to join in the fun with the crowd, taking part in the Mexican waves which spread around the stands during the change-overs.

The couple rose to their feet when Murray clinched victory in an emphatic two sets, winning by 6-4 6-1.

They were given another round of applause as they left the stands, while Murray, who will now play either Novak Djokovic or Jo-Wilfried Tsonga in the last four, walked off the court to deafening cheers.

Andy Murray, one of Team GB's strong
podium hopefuls, has moved within one match of securing at least a
silver medal at the Olympic Games after dismantling Spaniard Nicolas
Almagro in today's quarter-final.

The
Scot – who lost only a month ago in the Wimbledon final to Roger
Federer – is desperate to earn a gold medal at the Games after his
plucky defeat at SW19, and must progress through the semi-final and the
final to fulfill his dream.

Serbia's Novak Djokovic or France's Jo-Wilfried Tsonga await the Scot now, and he could meet world No 1 Federer in the final.

Being cheered on by the Duke and Duchess
of Cambridge, his Mother, Judy, and girlfriend Kim Sears – the Scot
sought to take the game to his opponent.

After winning he threw his wrist bands in
the air, and roared before his signature salute to the skies before
leaving the court, proving just how much an Olympic podium place would
mean to him.

After his tearful Wimbledon final defeat
to Federer, Murray is on course to take an Olympic medal one way or the
other. But with Djokovic or Tsonga lying in wait, it will be tough for
the Scot to achieve bronze or silver.

The Duke and Duchess of Cambridge looked delighted with Murray's victory today which sets him in a good position for taking home a medal

The Duke and Duchess of Cambridge looked delighted with Murray's victory today which sets him in a good position for taking home a medal

The Duke and Duchess of Cambridge looked very happy as they watched Great Britain's Andy Murray in action, Kate, who is a keen tennis fan regularly watches the sport

The Duke and Duchess of Cambridge looked very happy as they watched Great Britain's Andy Murray in action, Kate, who is a keen tennis fan regularly watches the sport

Kate looked effortlessly chic in a bright blue knee-length dress which she matched with her favourite navy blazer and a blue velvet clutch. her husband looked equally smart in a suit with open white shirt

19/07/2012: The Duchess of Cambridge, Patron, visits The National Portrait Gallerys Road to 2012:

Kate looked effortlessly chic in a bright blue knee-length dress which she matched with her favourite navy blazer and a blue velvet clutch. The electric blue Stella McCartney number was Kate's outfit choice just a few weeks ago at the opening of a new exhibition at the National Portrait Gallery

Kate and William avidly watched on with tense expressions as Murray suffered a slight wobble in
the fourth game when he double-faulted twice, but held and then broke
his opponent again in the following game with a brilliant forehand.

The
Scot held superbly before breaking the Spaniard again in the seventh
game to seal a victory that was greeted by a standing ovation from the
crowd, including the Royal couple.

Despite the crowd's enthusiasm for the British number one's Olympics bid, there were still rows of empty seats in the stands, particularly in the lower tiers.

Hundreds of fans visiting the All England Club without tickets to the match gathered outside the court on Murray Mound to watch the action on the big screen as the sun shone down.

Murray was delighted with the quickfire victory in front of William and Kate.

He said: 'I didn't speak to them after the match but it's always nice when you're playing in front of royalty.

'When you get people like that coming along it helps raise the profile of the sport.

'It was a good performance today. I served well and that helped. It was good to get it finished early. I didn't want a long match because I am playing in the doubles this afternoon. Now I hope I can get a medal.'

Murray was disappointed to see rows of empty seats on Court One, however, and urged organisers to make sure the stands are full for his semi-final, and Sunday's medal matches.

'I would like to see all the seats full in all of the stadia but for whatever reason they haven't been,' the Scot said.

'The support inside and outside the stadiums has been great so hopefully over the weekend we will get all the courts packed.

'Centre Court was really busy the last two rounds I have played on there and hopefully they will all be full. Everyone wants to see that.

'Lots of people want to see the Games, there are lots of people trying to get tickets and it's not easy so I don't want to see any empty seats.'

The young Royals both looked effortlessly smart in the Royal box today as they cheered Andy Murray on to victory. William was once again spotted sporting his Team GB pin

The young Royals both looked effortlessly smart in the Royal box today as they cheered Andy Murray on to victory. William was once again spotted sporting his Team GB pin

Britain's Andy Murray celebrates his victory over Spain's Nicolas Almagro during their men's singles tennis match quarterfinal

Thank heavens for that: Murray did his signature salute to the skies after winning against Almagro

Thank heavens for that: Murray did his signature salute to the skies after winning against Almagro at the quarter finals match today

Kate and William were immersed in the match and looked tense as they watched the Olympic hopeful play

Kate and William were immersed in the match and looked tense as they watched the Olympic hopeful play

Tennis fans gathered to watch Andy Murray play Nicolas Almagro in the Quarterfinal of Men's Singles Tennis on Day 6 of the London 2012 Olympic Games at Wimbledon

Tennis fans gathered to watch Andy Murray play Nicolas Almagro in the Quarterfinal of Men's Singles Tennis on Day 6 of the London 2012 Olympic Games at Wimbledon