Signature Scroll: Jackson Koivun, Justin Thomas prove perfect tandem at Medinah

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MEDINAH, Ill. – Jackson Koivun 's much-anticipated Presidents Cup debut began with a vicious club twirl.

Of course. The kid bending the golf world to his will had just tackled one of the most nerve-racking tee shots in golf with ease, striping it down Medinah Country Club’s first fairway.

“There’s been too much practice,” one U.S. support member told me as we walked off the tee box. “He’s ready to play. He’s ready to show he belongs.”