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InjuryBWF World Tour· 3 min read· in Sports

Kunlavut Vitidsarn Reaches Japan Open Quarterfinals in Resurgent Return From Back Injury

Thailand's former world champion Kunlavut Vitidsarn has successfully returned to the BWF World Tour, advancing to the Japan Open quarterfinals just weeks after a torn back muscle forced him off the court.

By Jackson Reed

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The former men's singles world champion from Thailand has officially returned to form. Kunlavut Vitidsarn eased into the quarterfinals of the DAIHATSU Japan Open on Thursday, dispatching Singapore's Jia Heng Jason Teh in straight sets. The 21-11, 21-16 victory signaled a resurgent return for the world No. 2, who had been sidelined for a month due to a painful back injury.[1][4]

In a Super 750 tournament where several top-ranked players—including Jonatan Christie and Loh Kean Yew—have struggled or faced early elimination, Vitidsarn's steady performance stood out. His trademark rock-solid defense and clinical smashes appeared fully intact, allowing him to control the tempo from the opening serve against the rising Singaporean star.[1][4]

The smooth performance in Tokyo stands in stark contrast to his condition just weeks ago. During the Round of 16 at the Singapore Open in late May, Vitidsarn suffered a torn lower back muscle while playing India's Lakshya Sen. After experiencing severe pain while bending and twisting, he managed to play only two points before retiring from the match to prevent further damage.[3]

Timeline of Kunlavut Vitidsarn's recovery from a torn back muscle.

Returning to Thailand, Vitidsarn underwent an MRI scan that confirmed the muscle tear and inflammation. The national team's medical staff immediately withdrew him from the prestigious Indonesia Open, prescribing a strict regimen of rest followed by targeted core-strengthening exercises. The goal was to stabilize his spine and rebuild his physical foundation without rushing the recovery timeline.

Vitidsarn's return to the court earlier this week was not without friction. In his opening Round of 32 match on Wednesday, he faced a stiff test from India's Ayush Shetty, a player who had defeated him at the Badminton Asia Championships in April. Vitidsarn took his time to find his rhythm, eventually pulling away in the third game to secure the win.[2]

Following that opening victory, Vitidsarn was transparent about his physical state. He admitted that he did not yet feel like a top player and that his pain level was hovering around a "three out of 10." Rather than pushing for immediate perfection, he approached the early rounds as a testing ground to evaluate his attacking and defensive capabilities under tournament pressure.[1][2]

Vitidsarn utilized his trademark rock-solid defense to outclass his opponents in Tokyo.

"Whoever put more pressure first can gain the advantage," Vitidsarn noted after his first match, emphasizing that his primary focus is trying out different strategies before the upcoming BWF World Championships. Against Jason Teh in the Round of 16, that tactical patience paid off, as he minimized unforced errors and systematically dismantled his opponent's game plan.[2][4]

With the BWF World Championships in New Delhi looming in August, Vitidsarn is peaking at precisely the right moment. The 2023 world champion has made no secret of his ambitions, stating clearly that his ultimate dream is to capture another world title. "I need to get the gold medal again," he remarked in Tokyo, adding that he still views himself as a player who needs to learn and practice to truly cement his status at the top.[1]

Vitidsarn currently holds the No. 2 spot in the BWF Men's Singles rankings.

Vitidsarn's successful rehabilitation offers a blueprint for injury management in an increasingly grueling BWF calendar. By prioritizing a full recovery over immediate ranking points in Indonesia, he has preserved his body for the season's most critical events. As he advances to the final eight in Japan, the rest of the men's singles field is now on notice: the Thai champion is back, and his eyes are firmly set on gold.[1]

Key points

  • Thailand's Kunlavut Vitidsarn advanced to the Japan Open quarterfinals by defeating Singapore's Jia Heng Jason Teh 21-11, 21-16.
  • The world No. 2 returned to the court after a one-month layoff due to a torn lower back muscle suffered in May.
  • He survived a grueling three-game opening match against India's Ayush Shetty before finding his rhythm in the Round of 16.
  • Vitidsarn is using the Japan Open to test his physical condition and tactical readiness ahead of the BWF World Championships.

How we got here

  1. May 28, 2026

    Retires mid-match against Lakshya Sen at the Singapore Open due to lower back pain.

  2. May 29, 2026

    Undergoes an MRI in Thailand, revealing a torn back muscle and inflammation.

  3. June 2026

    Withdraws from the Indonesia Open to focus on a core-strengthening rehabilitation program.

  4. July 15, 2026

    Returns to action at the Japan Open, defeating India's Ayush Shetty in three games.

  5. July 16, 2026

    Advances to the quarterfinals with a straight-sets victory over Jia Heng Jason Teh.

Thai Badminton Camp 40%Neutral Analysts 35%BWF Competitors 25%
Thai Badminton Camp
Relieved to see their top player return to form and prioritize long-term health over minor tournaments.
Neutral Analysts
Cautiously optimistic about his game but noting his own admission that he is not yet playing at 100 percent.
BWF Competitors
Aware that a healthy Vitidsarn drastically shifts the competitive landscape heading into the World Championships.

Perspectives this story doesn't cover

  • Sports physiotherapists specializing in lower back mechanics
  • Singaporean fans reacting to Jason Teh's defeat

Sources

Source coverage

4 outlets

3 viewpoints surfaced

Thai Badminton Camp 40%Neutral Analysts 35%BWF Competitors 25%
  1. [1]Olympics.comNeutral Analysts

    BWF Japan Open 2026: Resurgent Kunlavut Vitidsarn into last eight

    Read on Olympics.com →
  2. [2]BWF BadmintonBWF Competitors

    Japan Open: Vitidsarn Passes Stiff Opening Test

    Read on BWF Badminton →
  3. [3]YardbarkerBWF Competitors

    Lakshya Sen Vs Kunlavut Vitidsarn Live Score, Singapore Open: Vitidsarn Retires!

    Read on Yardbarker →
  4. [4]BWF TVNeutral Analysts

    DAIHATSU Japan Open 2026 | Super 750 Men's Singles | Round of 16 Jia Heng Jason Teh (SGP) vs Kunlavut Vitidsarn (THA)

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