Rory who? Caroline Wozniacki celebrates with pal Serena Williams after completing New York marathon on 'same weekend she was due to marry former fiance McIlroy'

She should have been walking down the aisle this month but instead Caroline Wozniacki was pounding the streets of New York on Sunday.

The 24-year-old professional tennis player signed up for the New York Marathon after fiance and professional golfer Rory McIlroy called off their engagement in May, just days after they sent out their invitations. 

And although Caroline insisted her decision to enter the marathon had nothing to do with her heartbreak, it won't have escaped fans' attention that she chose to run in the same city, and on the same weekend - according to the Irish Independent - that her wedding was due to take place.

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Celebrations: Caroline Wozniacki was greeted at the finish line of the New York marathon by Serena Williams as she completed the course on what reportedly should have been her wedding weekend with Rory McIlroy

Happier times: Rory McIlroy reportedly got cold feet and dumped Caroline just days after their wedding invitations were sent out earlier this year

Caroline - whose wedding date had been rumoured to be either this weekend or next - completed the course in an impressive three hours, 26 minutes and 33 seconds and proving that she doesn't need the golfer, she was greeted at the finish line by her close pal and fellow tennis professional Serena Williams. 

World number nine Wozniacki ran for children's charity 'Team for Kids' and has raised over $81,000 on fundraising site 'Crowdrise'.

Before the race, she posted a selfie to her Twitter page, alongside the caption, 'Ready or not... Here I come. Few min left! @nycmarathon'.

The photograph showed her, and her fellow runners, wrapped up in plenty of layers ready to tackle the New York Marathon, where the temperature was recorded at just 5.5 degrees on the morning of the race.

Superstar: Caroline Wozniacki slipped on her running shoes to complete the New York Marathon in 3 hours 26 minutes and showed no sign of being upset about her cancelled wedding 

Pushing through: The tennis star grimaced as she makes a last push to the finish line on Sunday

Regardless of the difficult conditions, Danish-born Wozniacki completed the race, and was met at the finish line by an emotional Serena.

Williams, who herself is ranked number one in the world, is good friends with her fellow tennis professional, and tweeted explaining that she cried upon greeting Wozniacki at the finish. 

In the competitive standings, Wilson Kipsang and Mary Keitany claimed a famous double for Kenya as they raced to victory.

Kipsang crossed the line in two hours, 10 minutes and 59 seconds, the slowest winning time since 1995 on a day when chill winds hampered the competitors, while Keitany made it home in 2.25.07.

Happy: Just minutes before the race, the tennis player tweeted: 'Ready or not... Here I come', left. Right, she celebrated at the finish line

Rory who? Wozniacki celebrated her impressive time alongside Williams after the race proving that she has firmly moved on from her heartbreak thanks to pals 

She sprinted past compatriot Jemina Sumgong with just a few hundred yards to go, and Portugal's Sara Moreira finished third with the women starting ahead of their male counterparts.

Kipsang followed suit, breaking the tape seven seconds ahead of Lelisa Desisa, who led fellow Ethiopian and 2010 winner Gebre Gebremariam home.

Caroline had reportedly already tried on her bridal dress before her ex-fiance, Rory, 25, called off their wedding. 

According to The Times, the 23-year-old had tried on her wedding dress ahead of the planned November marriage. 

In a shock move, the golfer announced that they had split as he was not ready for ‘all that marriage entails’.

Caroline Wozniacki celebrates as she finishes the New York...

Famous face: Tennis star Caroline (center), of Denmark, was spotted competing in the New York City Marathon today

Prepared to rock: Caroline was all smiles as she holds up her race card ahead of the marathon

McIlroy confirmed the split , saying 'it was mutual and amicable and we both thought it was the best for us'.

Multi-millionaire McIlroy admitted that he got cold feet after the wedding invitations were posted, saying: ‘The problem is all mine’.

‘There is never a good time to end a relationship,’ he said and he added that the decision to call off the engagement was both 'mutual and amicable'. 

After two years together, McIlroy, who is worth an estimated £28million, proposed to Wozniacki in Sydney, Australia, on New Year's Day with a stunning £120,000 diamond ring.

According to sources, their wedding was due to take place at the Rockefeller Centre in New York on November 8 but there are also rumours that it was November 1.

In a brief statement issued morning through his Dublin-based communications consultants, McIlroy said he was making the announcement publicly after talking to Wozniacki.

'The problem is mine,' he said.

'The wedding invitations issued at the weekend made me realise that I wasn't ready for all that marriage entails.

All for a good cause: World number nine Wozniacki ran for children's charity 'Team for Kids' and has raised over $81,000 on fundraising site 'Crowdrise'

'I wish Caroline all the happiness she deserves and thank her for the great times we've had.'

At the time of their engagement, Wozniacki, who is worth an estimated £15m, posted a picture of the engagement ring on her Twitter account, writing: 'Happy new year everyone! Rory and I started 2014 with a bang! ...I said YES!!!!'

He then shared the same picture and added: 'Happy New Year everyone! I have a feeling it's going to be a great year!! My first victory of 2014 #shesaidyes!!'

The pair have experienced an on/off relationship during their time together.

Sources close to the high-profile couple claimed the Irish golfer broke it off with Wozniacki in April last year - days after she posted a picture on Twitter showing him asleep and open-mouthed with his glasses on.

Joyous: Serena was overjoyed for her pal and they shared a hug at the finish line

Standing out in the crowd: In her hot pink ensemble, Caroline stood out in the crowd and looked fresh-faced upon her finish 

Friends at the time said there was no way back and the tennis ace was described as being 'absolutely devastated'.

But she was then spotted among the gallery watching McIlroy at the Dubai World Championships in November. It was the first time the Danish tennis star had been seen at a golf event since she donned caddies’ overalls for the par three tournament at the Masters back in April.

Earlier in 2013, McIlroy was warned by Britain's greatest-ever golfer Nick Faldo to 'concentrate on golf' after a dramatic slump in form.

Last December the pair were forced to deny rumours they were engaged after Wozniacki was spotted wearing a huge diamond ring on her wedding ring finger.

Engaged: After two years together, McIlroy, who is worth an estimated £28million, proposed to Wozniacki in Sydney, Australia, on New Year's Day with a stunning £120,000 diamond ring

Speculation first began when the tennis star was seen flashing the diamond and sapphire jewel as she arrived at Brisbane International Airport.

They eventually confirmed their engagement on New Year’s Day after McIlroy, who won the U.S. Open in 2011 and the U.S. PGA Championship in 2012, proposed during a fireworks show on New Year's Eve in Sydney. 

In an interview with Danish magazine, Lime, she even told how she dreamed of becoming a young mother.

She said: ‘I want to be a relatively young mother, and I do not see it as being too far in the future. I have always been like that. I would want to bring up my children.

‘Therefore, I have no dream to make my mark. Instead, I enjoy economic freedom my hard work has given me. It means that I can give my children the best start in life.’ 

Cold feet: Multi-millionaire McIlroy admitted that he got cold feet after the wedding invitations were posted, saying: ‘The problem is all mine’