The awkward exchange lasted for several moments as Harry kept his arm squarely around his wife, leading others to shuffle around them to find a place.
After Meghan insisted on keeping her place, the woman was forced to duck under the trophy to find her spot on stage, before saying something to Meghan.
Harry appeared red-faced during the exchange - although this may have been more due to his efforts on the blistering hot day as he led his team to victory at the Royal Salute Polo Challenge.
Meghan was joined at the $1,600-a-ticket event by her close friend Serena Williams, and dressed to impress as she donned an $800 dress from California designer Heidi Merrick.
The royal, who has worn the designer before, paired the flowing white sundress with a statement bow and cut out back with a $3,300 Maison Valentino bag.
Surrounded by her camera crew, Meghan appeared at ease as she took a risk in towering heels on the grassy terrain.
While Harry competed in his regular polo attire, he had arrived at the event hand-in-hand with the Duchess in a crisp summer look.
He opted for a pair of cream trousers, a pale grey jacket, and a pale blue shirt, while donning some slip-on tan shoes.
Harry squared off with his longtime pal Nacho Figueras at the tournament, and appeared to take the event in stride as he chatted with guests and posed for the Netflix camera crew.
The couple later posed with Nacho - described as the 'David Beckham of polo' - and his Argentine socialite wife Delfina Blaquier.
The Duchess of Sussex, 42, beamed with delight as she presented her husband with his trophy
Meghan embraced the beaming sunshine in an elegant white dress, which featured a pleated skirt design, halterneck top, and a cut-out at the waist
Meghan was joined at the event by her close friend, tennis legend Serena Williams
Harry and Meghan were joined at the event by Nacho - who is known as the 'David Beckham of polo' and his wife, Argentine socialite Delfina Blaquier
