The Air Tech Challenge emerged during a time when the now retired tennis legend Andre Agassi was at his prime. For a while, people just called it the “Agassi”. First introduced in bright editions, the iconic silhouette has toned down a bit over the years. For the Spring 2015 season, Nike Tennis introduces the Air Tech Challenge IV Low in a subdued Anthracite colorway. In addition to the premium upper, it features faux carbon fiber detailing on the heel, along with speckled accents on the midsole. The Nike Air Tech Challenge IV Low in Anthracite/White is available now at select retailers, including Concepts. Turn the page for a closer look.