Abigail ClarkeJessica Pegula, world No. 3 on the WTA Tour and one of the 2026 US Open favourites, stopped mid-serve during her Cincinnati Open quarterfinal against Amanda Anisimova on 20 August — and the moment revealed something every physically active person needs to understand about their own body.
Two games into the match, Pegula pulled up with visible discomfort. She took a medical timeout while trailing 3-0 in the second set, spoke with the on-court physio, and then told reporters: "If it gets drastically worse, I'll stop." She did not stop. Pegula won 6-4, 2-6, 7-6(4), then defeated top seed Iga Świątek 7-5, 4-6, 6-4 to reach the Cincinnati final, saying the injury had settled on her day off. As the 32-year-old enters the 2026 US Open — having won titles in Dubai and Charleston and reached her first Australian Open semifinal — her calculated risk paid off.
For most people, however, such calculations carry far greater uncertainty. Without a physio court-side, a medical team on call, and years of professional body-awareness, the decision to continue or stop can have consequences that extend well beyond a tennis match.
Why Pegula's Rare MTO Is Significant
Medical timeouts in professional tennis are genuinely uncommon. Elite players train to suppress discomfort signals, and the culture of the sport rewards those who push through. Pegula herself is known for rarely taking MTOs — making her Cincinnati timeout a meaningful signal even within the sport.
What made Pegula's response instructive was its clarity: she articulated a pre-set threshold ("drastically worse") and committed to honouring it. That is sports medicine thinking applied correctly. A hard limit — set before adrenaline overrides judgement — is the difference between managed risk and recklessness.
Family history adds emotional weight to Pegula's relationship with health decisions. Her mother, Kim Pegula, suffered a cardiac arrest in June 2022. Jessica has spoken openly about contemplating early retirement to support her family during that period. Kim Pegula has since recovered and was courtside at the 2025 US Open — a detail Jessica has described as an ongoing source of motivation. That personal context makes Pegula's "if it gets drastically worse" threshold more than sports strategy. It reflects someone who understands, viscerally, what health emergencies actually look like.
What the Stats Say About Athletes and Hidden Risk
The UK has approximately 12 million adults who exercise regularly enough to class themselves as recreational or competitive athletes — cyclists, runners, CrossFit participants, amateur tennis players, weekend footballers. Sudden cardiac arrest in sport occurs in approximately 1 in 100,000 athletes per year, a low absolute rate that nonetheless translates to hundreds of events annually across the country.
The risk factor most people underestimate is the mismatch between perceived fitness and underlying cardiac health. Being fit does not protect against all cardiac conditions. Hypertrophic cardiomyopathy (HCM), the most common inherited cardiac condition in the UK — affecting around 1 in 500 people — can remain completely silent until triggered by intense exertion. The English Football Association's cardiac screening programme has found that 0.38% of young athletes have cardiac disorders associated with sudden cardiac death, and a further 2% have congenital or valvular abnormalities.
According to the NHS, chest pain during exercise — even mild or brief — is a symptom that should always be assessed medically. The same applies to unexplained palpitations, dizziness during exertion, and fainting or near-fainting during physical activity. These are not symptoms to manage with rest and hope.
The table of red-flag symptoms that merit specialist assessment:
- Chest pain or tightness during or after exercise
- Palpitations (racing or fluttering heartbeat) at rest or during exertion
- Unexplained fainting or near-fainting during physical activity
- Shortness of breath disproportionate to effort
- Dizziness or lightheadedness that persists after stopping
A single occurrence, in isolation, may be benign. A recurring pattern — or any of the above combined with a family history of cardiac conditions — changes the calculus entirely.
When Pushing Through Stops Being Smart: A Concrete Scenario
Consider a 39-year-old recreational cyclist in Leeds — call her Alison — who has been training five days a week ahead of a 100-mile sportive in October. She is fit, experienced, and used to managing soreness. During a hill-interval session on 15 August, she notices she is more breathless than usual at the same power output she has maintained for months. She also feels her heart "flutter" irregularly for around 30 seconds before settling. She stops, waits, feels fine, and completes the remaining intervals.
The next day: no symptoms. The following week, the same flutter returns during a different climb.
Under NHS clinical guidance, Alison's presentation — unexplained palpitations recurring across two separate sessions within a 14-day window, combined with unexplained breathlessness at a familiar effort level — warrants a GP appointment specifically flagging symptoms during exercise. That referral will typically trigger a 12-lead ECG.
Here is the critical if/then: if palpitations or unexplained breathlessness recur during two or more separate exercise sessions within a four-week period, then book a GP appointment within 48 hours — not after the sportive, not "next month when things calm down." Urgency escalates immediately if the symptom includes chest pain, fainting, or a family history of sudden cardiac death under age 50.
If Alison's ECG shows an abnormality, she will be referred for an echocardiogram. Private echocardiograms in the UK cost between £200 and £450. A private sports cardiology consultation runs between £200 and £350 for an initial assessment. These figures compare favourably to the clinical and personal cost of a cardiac event managed weeks or months too late.
If Alison's investigations come back clear, she has something equally valuable: a baseline cardiac record and the confidence to compete without uncertainty. She returns to training knowing the risk has been measured, not assumed away.
The scenario also illustrates the issue with amateur athletes that elite players like McCartney Kessler and others rarely face: recreational athletes have no physio on court, no team physician on call, and no mechanism for a quick mid-session assessment. The pre-set threshold must therefore be conservative, not aspirational.
The Goal-Proximity Trap
Pegula's own words were instructive beyond the medical: "Obviously, you're thinking long term towards the (US) Open." Even world-class athletes can be biased by proximity to a goal — the closer the target, the higher the threshold people set for seeking help.
For amateur athletes, the equivalent sounds like: "I'll deal with it after the race," "I've been building for a year — I can't lose momentum now," or "It was probably just a one-off." Sports medicine specialists recognise this as competition bias, and it is one of the most common reasons symptomatic recreational athletes delay care by weeks or months.
The crucial difference between Pegula and a recreational cyclist or runner is not talent. It is access: Pegula had a physiotherapist within seconds, a medical team monitoring her, and decades of professional body-literacy. Most people exercising in parks, gyms, and cycling clubs in the UK do not have any of those resources. For them, the pre-set threshold for seeking help should be far lower than "drastically worse."
Pegula's MTO was a public reminder that even athletes at the top of the sport take symptoms seriously enough to pause. For the rest of us, the bar for pausing should be lower — not higher.
Steps to Take If Symptoms Arise During Exercise
If you are an active adult in the UK and experience any of the red-flag symptoms listed above:
- Stop the activity immediately if you experience chest pain, fainting, or sustained palpitations during exercise
- Call your GP the same day and specify that symptoms occur during physical activity — this triggers the appropriate cardiac pathway
- Request an urgent referral if symptoms include chest pain, a family history of early-onset cardiac conditions, or repeated episodes
- Consider a private sports medicine or cardiology consultation via ExpertZoom if NHS waitlists would delay your assessment; a specialist can order and interpret an ECG and echocardiogram within a single appointment
- Log your symptoms — time, activity level, intensity, duration — before the appointment; patterns matter more than single events
Jessica Pegula's Cincinnati scare ended well. She pushed through, won, and walks into the 2026 US Open as one of its most credible contenders. But her willingness to set a threshold — and to have the professional infrastructure to honour it — is the model worth borrowing, not the decision to continue. For the millions of recreational athletes in the UK without a medical team court-side, the right call is almost always to get checked first.
This article is for informational purposes only and does not constitute medical advice. If you experience chest pain, palpitations, fainting, or other cardiac symptoms during exercise, seek medical advice promptly from a qualified healthcare professional. In an emergency, call 999.
