Prince William, Prince Harry Play Polo as Kate Middleton Awaits Royal Baby’s Birth

Prince William and Prince Harry
As Kate Middleton prepares to give birth to the royal baby, Prince William and Prince Harry -- seen here on June 16, 2013 -- compete in a charity polo match on Saturday, July 13 Max Mumby/Indigo/Getty Images

There's no doubt that Prince William is eager to welcome his first child with wife Kate Middleton. But until the royal baby decides to make an appearance, the Duke of Cambridge still has duties and obligations to fulfill as a member of the royal family. On Saturday, July 13, he and his younger brother, Prince Harry, competed against each other in the Kent & Curwen Royal Polo Cup in Sydmonton, England. 

The 31-year-old first-time father-to-be was playing on behalf of the Tusk Trust and Sentebale charities. At halftime, his team led Harry's two goals to one. By the end of the match, however, the tables had turned. Uncle-to-be Harry and his teammates pulled ahead, beating Prince William four goals to three.

The Duke of Cambridge didn't stick around long after losing, but only because he wanted to get home to his nine-months-pregnant wife. William has been at Kensington Palace in London since Wednesday, July 10, after a long shift with the Royal Air Force in Anglesey. He is expected to return to work on Monday, July 15 — assuming the Duchess doesn't give birth before then, of course. (Barring any surprise deliveries, he'll also compete in a polo match on Sunday, July 14, in aid of WellChild, Centrepoint, and Child Bereavement UK.)

It's been a busy few days for the royal family. Amid the increasing royal baby mania, Queen Elizabeth II opened up Buckingham Palace this week to host the Coronation Festival. On Thursday, July 11, the Middleton family — Pippa, James, Michael, and Carole — joined the Queen, Prince Charles, Camilla, Duchess of Cornwall, and others at the Coronation Festival Concert in celebration of the 60th anniversary of the Queen's coronation.

Aunt-to-be Pippa also had an out-of-town obligation on Saturday, July 13. She flew to Vienna for the day to attend the wedding of Caroline Sieber and Fritz Von Westonholtz.

The Duchess, meanwhile, is nesting at Nottingham Cottage as she awaits her baby's birth. "Catherine and William are very much looking forward to the arrival of their son or daughter," a palace aide told Us. "It's a very exciting time for the couple and their families."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!