Emma Raducanu suffered another fitness blow during her first round defeat to at the Ningbo Open.The British no. 1 lost 6-3 4-6 1-6 against the wildcard Zhu Lin on Tuesday as Raducanu’s end-of-season struggles continued. Raducanu needed to be treated courtside for a lower back issueSky SportsRaducanu was in action just days after retiring from the Wuhan Open amid the extreme heat she battled on the court.She revealed on social media that she was feeling better, but it seems as though a new issue has cropped up in her latest outing.During the second set against Zhu, Raducanu had her blood pressure taken by medics.The 22-year-old then needed a medical timeout in the third set and was given treatment on her back in worrying scenes.Raducanu appeared to be struggling to move as she lost the decisive point to end her Ningbo Open campaign.What next for Raducanu?Since her US Open third round exit to Elena Rybakina, Raducanu has found it tough across the Asian Swing tournaments.She decided to play at the Korea Open instead of the Billie Jean King Cup and was close to tears during her opening win over Jaqueline Cristian.Raducanu was then beaten by Barbora Krejcikova despite winning the first set and leading the second 5-3.At the China Open, the 2021 US Open champion beat Cristina Bucsa but lost against Jessica Pegula over three sets.Retirement at the Wuhan Open followed, and it remains to be seen if Raducanu will play again in 2025 amid her latest setback.Raducanu may bring an early end to her 2025 seasonGettyShe is scheduled for appearances at the Pan Pacific Open and the Hong Kong Open in the coming weeks.However, Raducanu could potentially sit out of both tournaments in a bid to regain fitness ahead of the 2026 season.It begins in Australia with the United Cup, as well as the Brisbane International and ASB Classic.The Adelaide and Hobart Internationals follow in the lead up to the Australian Open, which starts on January 12.Raducanu reached the third round in Melbourne earlier this year, and an appearance in 2026 would be her fifth at the Grand Slam.