Serena Williams enlisted some unusual help to finish a 5k race

Serena Williams took an unorthodox approach to a charity race this week.

Serena Williams took an unorthodox approach to a 5k race this week - enlisting a taxi to get her to the finish line.

The race was one she had arranged herself as a fundraiser for charity, the Serena Williams Live Ultimate Run in Miami Beach.

Naturally, the tennis star wanted to take part in her own race, but was hampered by an existing injury.

Damn injury: @serenawilliams has been spotted catching a taxi to the finish line of her own charity run. pic.twitter.com/uBAE8aIAVX

— Tennis Photos (@tennis_photos) December 13, 2015

Not wanting to let her fans and fellow participants down, she hailed a cab to get her to the finish line to greet the other runners.

“I didn’t run the whole way this year but next year I will,” she promised in a video on Facebook.

If you cannot see the embedded Facebook post click here.

Serena’s older sister Venus finished the race, along with approximately 3,000 other runners.

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The 34-year-old is having a good week despite her injury - yesterday Sports Illustrated named her their Sportsperson of the Year.

The 2015 #SISportsperson of the year is... @serenawilliams! https://t.co/Zt4QEIl1MY pic.twitter.com/MBVZpWgQiV

— Sports Illustrated (@SInow) December 14, 2015