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Philipp Kohlschreiber

US Open Lookahead: Federer close to, yet far from, No. 18

More than three years have passed since Roger Federer last won a Grand Slam title.

That's not to say he hasn't played well in the meantime: As he likes to point out, it takes some doing just to make it to the latter stages of a major tournament, and Federer has managed to continue to do that.

His seemingly effortless trip to the U.S. Open semifinals — Federer has won all 15 sets he's played entering Friday, dropping only 44 games along the way — marks his sixth run to that round in the past 11 majors.

And yet when Federer was asked about being two wins away from grabbing another trophy, he noted that there is plenty of work left.

"Hours of work...