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Raducanu began her quest to qualify at the US Open on Wednesday
Emma Raducanu, who is in New York to attend the US Open, is acutely aware of the physical demands she will face to be able to compete at the highest levels.
Raducanu, the youngest British woman to reach the fourth round at Wimbledon in Open era, was last month.
After beating two top-50 players the 18-year old retired with breathing difficulties, dizziness and dizziness after trailing Ajla Thomasljanovic 4-6-0-3.
She said that Wimbledon was an "extremely positive experience".
"I learned so much about my game and what it takes for me to be a top performer. It has definitely taught me how much physical work I still need to do.
Raducanu said that she had only done her first practice session in New York and that it was a completely new experience to be doing the same intensity for two weeks consecutive.
"I believe that this is a huge gap in my game. Since then, I have been trying to physically gain strength and endurance.
Raducanu has enjoyed a lot success since Wimbledon. On A-level results day, she was awarded an A* and A in Maths.
She reached the finals of the WTA Challenger Chicago event last week, and is now at 150 worldwide.
Raducanu was replaced by Andrew Richardson as coach following Wimbledon.
Next, she will have to navigate three rounds of qualifying for US Open. In high heat and humidity, her first match will be against Bibiane Schoofs, a Dutch veteran player.
Raducanu reflects on an event in which she qualified as a qualifier and reached the quarter-finals before being forced to retire from heat exhaustion.
"It was very humid and hot. The heat rule was in effect most of the time there. After playing there for 10 consecutive days, I feel like I've acclimatized pretty well. I actually feel in pretty good physical shape.
Raducanu also replaced Nigel Sears, a highly-experienced coach, with Andrew Richardson (an ex-player on the British tour).
"I respect Nigel and we got along great. He is someone I highly respect, but at this stage in my development, I need a fresh voice and fresh eyes.
"Nigel was a great player, especially at the top of his game. I believe that's where he brings the most value.
"But I think right at the moment for where I am at - a nice step in development is to get some more voices in."