John Isner hits 18 aces to beat Marcos Baghdatis at Citi OpenCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceJohn Isner hits 18 aces to beat Marcos Baghdatis at Citi OpenCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Aug 3, 2013 | Modified Aug 3, 2013SI STAFFShare on FacebookShare on XHome/Tennis