admitted she felt "constant pressure" facing after suffering to the 'Queen of Clay'. The Brit was no match for the four-time French Open champion and went into her shell as she hit 17 unforced errors during the 79-minute contest.
It was a horrible day at the office for Raducanu, who now has a 0-5 record against Swiatek and struggled to stay with the fifth seed. But the world No. 41 knows there is work to be done if she wants to come close to the top players.
Raducanu has never taken a set off Swiatek and she suffered another crushing blow when they met in Melbourne earlier this year, winning just one game in the match. And the British No. 2 described just how suffocating it was to face the Pole, especially on her favourite court at Roland Garros.
"It's difficult. Like, you just don't really feel like there is that much space on the court, and certain moments you overhit, because yeah, you just feel constant pressure," the disappointed 22-year-old said.
"I definitely think, like, I can improve certain areas of my game to maybe make me feel like I have less holes. Yeah, I'm just going to try my best to work on that."
Swiatek has struggled for form of late - she suffered a shock third-round exit at the Italian Open, where she was defending the title, and has not reached a final at any tournament since winning here 12 months ago.
But the world No. 5 feels at home on the Parisian clay, and Raducanu was made to feel her wrath, adding: "I think Iga played really well today. Yeah, I think every time we have played she plays really well.
"It kind of puts really a lot of pressure on from the beginning, makes me feel like I have to maybe do something extra or I just don't know what to do in the moment.
"I think it does, like, shift the dynamics of the match a bit, and then it's very difficult to kind of stay with her as she grows in confidence. But, yeah, it just shows, I guess, the distance that I have to improve."
Raducanu has won just one match against a top-10 player this year, taking out eighth seed Emma Navarro en route to the Miami Open quarter-final, but she believes there is a way to go if she wants to challenge the very best.
"I think I have done a pretty good job of staying with and getting some good wins over players, you know, not like in the top 10," she explained.
"But there is a big difference as you go up into the top five and then playing Slam champions, it is a completely different ball game.
"I think there are certain elements of my game I really feel like I need to improve, but I don't necessarily want to go into detail here and broadcast it to everyone! But I definitely know that. I'm going to take it back to the team.
"But at the same time, I feel like I have really worked on my forehand and it's become more and more of a weapon. Especially on clay actually, it has maybe helped, because I have a bit more time to set up and do a bit more and get it to jump.
"I think in that way, the clay has actually helped me develop that as a weapon. So it will be interesting to see on the grass, where it is very different and a lot lower, if it will be as good. Yeah, have the other elements kind of transition on to the grass. It's pretty quick turnover."
Raducanu has a packed grass swing ahead of her. She has entered the WTA 500s in Queen's and Berlin, and the 250-point event in Eastbourne to prepare for Wimbledon.
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