Roger Federer's shot heard round the US Open - a jaw-dropping forehand around the post in a 6-4, 6-1, 7-5 win over Australian Nick Kyrgios - ranks as one of his most memorable, the Swiss tennis great says.

"It was definitely one of the more unique ones," said Federer, who raced forward and wide on a sharply angled shot from Kyrgios, stretched and flicked a forehand around the post on Arthur Ashe Stadium.

Kyrgios' eyes widened in astonishment as the ball landed in his court and could be heard saying at the ensuing changeover: "That's got to be the greatest shot in tennis."

Federer, 37, said the shot ranked right up there with some of the most memorable of his career. They include his smash off a smash by Andy Roddick at Basel in 2002 and a lob flicked over Andre Agassi on break point in Dubai in 2005.

AGENCE FRANCE-PRESSE