Brooksby, 20, heads to Paris, 2 years after a US Open splash

Like many a 20-year-old American in Paris for the first time, tennis pro Jenson Brooksby is excited about where he is and eager to see where he’s headed.

Brooksby, who’s from Sacramento, California, has been tearing up the lower-level ATP Challenger Tour — 19-2 record; youngest U.S. player to accumulate three titles in one season on that circuit in 15 years; ranking rose from 315th in February to 163rd on Monday — and now he’s looking for more.

Not just this week, when he’s scheduled to…