Marcos Giron

Marcos Giron reached the tour the long way and never stopped earning it. Born in Thousand Oaks, California to Argentine and Ecuadorian parents, he was the nation's top high-school recruit before choosing UCLA, where he won the 2014 NCAA Division I singles title and turned pro that summer. Then his body nearly closed the file: surgery on his right hip in December 2015 and his left hip in early 2016 cost him most of a season and buried him on the Challenger circuit. He didn't crack the top 100 until 2020, at age 26 — an arrival most peers reach half a decade earlier.

The game is repetition weaponized. A compact 5-foot-11 right-hander, Giron is the prototypical American "ball machine": flat, early-struck groundstrokes that redirect pace, deep court positioning, and a refusal to miss that turns rallies into endurance tests. He doesn't overpower — the serve is competent rather than a free-points machine — but his consistency drags bigger hitters into the kind of long exchanges that suit him and frustrate them.

That profile has made him a recurring draw-spoiler against the tour's heavier names. His career-high of No. 46 came off a stretch of deep runs and qualifying-proof main-draw results, and he's been a fixture in the back halves of the American hard-court swing — the kind of player Taylor Fritz and Frances Tiafoe would rather not see across the net in an early round. He's pushed and occasionally toppled top-20 opposition, the value of a clean ball-striker who never beats himself.

Now 88th and into his thirties, Giron is in the steady-veteran phase: grinding the US Open and Wimbledon main draws, picking off ranking points at 250s, and proving the late-bloomer engine still runs. For a player whose career began with two scalpels, longevity is its own statement.