Emma, 18, is the first British woman to win the US Open in singles since Virginia Wade in 1968 and is currently the top ranked British player.
Speaking to The Sun, HRVY, 22, whose real name is Harvey Leigh Cantwell, said he and Emma plan to meet up soon.
Pals: HRVY has revealed he has spoken with tennis star Emma Raducanu since her win at the US Open, describing them as 'good friends'
He said: 'I've spoken to her since she won. What an absolute star. She's amazing. We chat all the time. We're close. We're good friends.
'She's just stunned about winning. I watched the match with my whole family, like the rest of the nation. She is a lovely girl and she makes me proud to be British.
'She's waving the flag for us... I’m going to play tennis with her soon. I’m sure she can probably teach me a thing or two.
Former Strictly Come Dancing star HRVY added his family used to have a tennis court so he grew up playing the sport.
Success: Emma, 18, is the first British woman to win the US Open in singles since