Prince Harry's friend has shared a rare insight into the royal's parenting of Prince Archie and Princess Lilibet.
Nacho Figueras said the Duke of Sussex, 39, always wanted a family and has a "great and supportive wife in Meghan Markle".
He said: "Prince Harry is doing very well, and I admire how he has fully embraced fatherhood over the past couple of years."
The duke and Figueras faced off on different teams in the Royal Salute Polo Challenge charity match in Florida over the weekend.
Meghan Markle and Prince Harry have two children
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The Argentine polo star, who is a father of four, added that Prince Harry "loves being a dad" to son Prince Archie, four, and daughter Princess Lilibet, two.
Figueras said: "He loves parenthood. I admire him so much as a parent.
"He has a great and supportive wife in Meghan Markle."
Although Archie and Lilibet were not at the polo game in Florida, Prince Harry and Meghan greeted Figueras's daughter Alba with warm hugs.
Nacho Figueras and Prince Harry have been good friends for 17 yearsGettyThe three matches featuring three different teams were a fundraiser for Sentebale, which the Duke of Sussex co-founded with Prince Seeiso of Lesotho in 2006.
The charity helps young people in southern Africa affected by poverty, inequality and disease.
Meghan accompanied Prince Harry to Florida and handed him the winning trophy with a kiss.
Figueras claimed the Duchess of Sussex and their two children have been wonderful support for Prince Harry as he has dealt with the challenges involved in the cancer diagnosis of his father, King Charles.
Meghan Markle hugging Figueras's children over the weekend
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Meghan and Harry now live in the US GettyHe continued to tell People: "Seeing Prince Harry so involved with his children and happy with his great wife is heartening.
"His passion for family matches his passion for polo, which is what first drew me to him when we met years ago."
Figueras first met Prince Harry at a 2007 charity match benefiting Sentebale.
He continued: “We both love horses, polo, the thrill of competition, the speed with which the game is played and the adrenaline. We love and respect the beauty of these animals and the amazing ingredients that this sport offers."