John Isner reaches Citi semis

[truebluefan]

This is the time of year that's generally been kindest to 6-foot-9 John Isner and his big serve.

Pounding balls at up to 142 mph, the highest-ranked American man hit 18 aces and never faced a break point Friday during a 6-7 (5), 6-4, 6-4 victory over Marcos Baghdatis of Cyprus that put Isner in the Citi Open semifinals.