The sportwear industry is, as you would expect, a competitive field. With the difference between victory or defeat increasingly reduced to marginal gains, every aspect of an athlete’s game comes under close scrutiny and, alongside fitness, training, diet and psychology, what they wear is brought into even sharper focus. On top of that, big sports brands have been plying their trade for decades – not only refining their output, but developing a relationship with both sportsmen and women and, crucially, consumers. Building a sports brand from the ground up, and cutting through the noise, is no mean feat.

Of course, turned on its head, being a newcomer means rocking up free from dogma, being fast and agile, having to – out of necessity – shake things up. This is very much the route that entrepreneurial brothers Messrs Tom and Phil Beahon took when setting up Castore three years ago. Both coming from an athletics background, the pair tapped into the latest technical innovations to produce a luxury sporting line that effectively gave the wearer a head start.

The motto of the brand is “Better never stops”, and the brothers show no signs of doing so. Branching out into a new field – or, in this case, court – Castore unleashes its first tennis collection this summer, exclusively available on MR PORTER. Rather than to cockily presume that it knows best, the brand has done so by consulting one of the foremost names in the sport over the past decade, and one you might have heard of. Not just enlisted behind the scenes for his intimate knowledge of tennis (he’s a board advisor to the brand), Sir Andy Murray will play the role of ambassador, having announced a deal to wear Castore both on and off the court.

Undoubtedly, the advancements instilled in the line presumably drew Sir Andy to the brand. The highly breathable, anti-odour, lightweight fabrics employed across the collection come infused with silver ions to support moisture control, while offering an against-skin fit that flexes with every movement of the body. There are also tiny details the former Wimbledon champion couldn’t fail to notice: shorts with extra-deep bonded pockets for stashing balls; materials that naturally draw moisture, dissipating it into the atmosphere; laser-ventilated panels. The label’s off-court clothing also knocks it out of the park with technical features stealthily woven into highly wearable pieces, from merino-wool jacket with both a water-resistant membrane as well as a natty retro-feel bomber-style collar to tailored track pants for warm-ups or the weekend, depending on your needs.

A man with a good heart as well as a strong one, and known for his charitable work, it also won’t have escaped Sir Andy’s notice that the collection is constructed in Europe, in a Portuguese factory that is entirely solar-powered. In all, Castore’s foray into the sport is, in every sense, a game changer.