Serena William's main focus at the US Open as the end nears

As thousands held up in lines to enter the competition grounds hours before her match

People were there to watch, or simply ponder watching, Serena Williams swing her racket the manner in which she did to 23 Grand Slam singles titles

Williams was booked to play her first-round match in Arthur Ashe Stadium against Danka Kovinic, scheduled to begin at some point soon after 7 p.m.

"When Serena declared she would play the U.S. Open, we sold out in a nanosecond for Monday night and Tuesday night

Kriti Kamath, a 9-year-old from Boston, hauled a larger than usual yellow tennis ball in order to accumulate a few marks

On Monday, both were wearing blue T-shirts: Monroe's was decorated with "Serena" multiple times in various shades of purple

On Monday, both were wearing blue T-shirts: Monroe's was decorated with "Serena" multiple times in various shades of purple