Kevin Ullyett has won 34 career tennis titles - including two doubles (2001 US Open, 2005 Australian Open) and one mixed (2002 Australian Open) Grand Slams - and had a world ranking of 107th in singles. So he knows what it's like to fight his way through the ranks and play among the best. In this interview with Ross and Mike, Ullyett explains what it takes to make it to the top tier of professional tennis, the daily and financial pressures of just breaking even, how players cope with loneliness and the ups and downs and how modern developments in string technology have changed the face of the game in the last 10 years. It's a fascinating insight into the realities of a career where unwavering determination is one of the most important qualities a player can have,

SHOW NOTES

Kevin Ullyett's Wikipedia page

Andre Agassi's mind games with Boris Becker

Another funny Agassi story about a young Rafael Nadal

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We kick off this Spotlight at the Western States 100, where much of the buzz centered on David Roche’s DNF. Roche, a polarizing figure who promised to “science the shit” out of the race, faced unfair criticism both before and after the race, and Ross reflects on how the scientific process often works best when the "hypothesis" fails, and why confronting failed hypotheses to explain under-performance is more beneficial than riding a wave of success .

The "science the shit out of it" theme continues with Nike’s hyped attempt to help Faith Kipyegon break the 4-minute mile. It didn’t just fall short—it missed by a long shot, with Kipyegon never really giving the barrier a scare with a pacing strategy that reveals they all knew it was not truly feasible. Ross and Gareth unpack the science, pseudoscience and "hacks" behind the effort, with honorable mentions for the obviously flawed claims by scientists about drafting benefits, and criticism of many media who parroted hype points without critical thought. We wonder what the athlete who could break 4 looks like, and postulate that they probably don't exist. Yet. From ultra to ultra-short, we shift to the 100m, where Kishane Thompson clocked a blistering 9.75s—the fastest in a decade, leading Gareth to wonder why sprinting seems to have plateaued post-Bolt?

In Center Stage (37:14), legal expert Matt Kemp joins us to dissect a recent rugby case where a player successfully sued an opponent for causing a spinal injury with a reckless off-the-ball collision. Could this open the door to more civil claims in contact sports? Matt explains the legal standards around recklessness and duty of care. Ross Replies (1:15:23) to Discourse member Paul on the purpose of sports science and what "truth" means when studies can't be replicated?

And in Listener Lens (1:24:15), we explore ATP's role in exercise, wonder whether you can ever “run out” of it, and how the purpose of metabolism is to keep it in good supply. And Finally (1:31:17), we invite you all to join our Tour de France Fantasy League, and see if you can top Gareth and Ross' picks in our two leagues!

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Links

• Analysis of the 100m event that inspired our 100m chat
• Gymnastic medalists are getting older
• Report on the decision ruling in favour of a player injured by opponent
• Matt, our new legal expert, is a partner at Becker Kemp Solicitors & Attorneys
• Ross' reply to Tony on the ATP depletion question - members only
• TDF FANTASY LEAGUE - play one of our two leagues

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Carbohydrates have always been part of the endurance equation—but how much, when, and which types remain hotly debated. In this listener-driven episode, we tackle those questions and more, exploring a new paradigm in performance fueling that’s reshaping how athletes think about energy during exercise. Dr. Jamie Whitfield, Senior Lecturer at Australian Catholic University’s Mary MacKillop Institute for Health Research, joins us to break it all down.

For years, endurance athletes were trained to conserve carbs by becoming better fat-burners—adapting diet, training, and supplements to spare glycogen. But that thinking is evolving. As Jamie explains, the focus now is on maximizing carbohydrate use. Why? Because carbs are a more oxygen-efficient fuel source than fat—providing more energy per unit of oxygen. That efficiency improvement is a performance advantage in itself—like a supershoe, but internal.

We dig into how elite athletes are pushing 90 to 120 grams of carbs per hour, and what it takes to train the gut to handle it. Are there limits? What happens when intake exceeds demand? Where does the glucose go? Are there health risks? We also explore carb types and ratios, strategies for carrying fuel without excess weight, and how to tailor intake to your individual needs.

Jamie brings clarity to the technical details, helping translate complexity into actionable insight. If you’re fueling training or racing, this episode will reshape your approach to performance nutrition—and maybe your results too.

Show notes and links

Discourse is our VIP community, and it was questions from those listeners that inspired this interview. If you want to be part of the conversation, driving the content, and then engaging with other listeners after the show, you can join by making a small monthly pledge.

• The Podlogar paper that compared 90g/h to 120g/h, informing some of our discussion
• The Jeukendrup study Jamie mentioned that managed to provide 144g/h of carbs with a glucose-fructose mix
• one of the studies mentioned in which glucose ingested spared liver glycogen use during exercise
• A study that looked at performance and tolerance of carb solutions with different ratios of glucose to fructose

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