What is 2009 US Open (tennis)?
{{Infobox tennis event|2009|US Open (tennis)| | date=August 31 – September 14 | edition=129th | category = [[Grand Slam (tennis)|Grand Slam]] (ITF) | location = New York City, US | champms={{Flagicon|ARG}} [[Juan Martín del Potro]] | champws={{Flagicon|BEL}} [[Kim Clijsters]] | champmd={{Flagicon|CZE}} [[Lukáš Dlouhý]] / {{Flagicon|IND}} [[Leander Paes]] | champwd={{Flagicon|USA}} [[Serena Williams]] / {{Flagicon|USA}} [[Venus Williams]] | champxd={{Flagicon|USA}} [[Carly Gullickson]] / {{Flagicon|USA}} [[Travis Parrott]] | champbs={{Flagicon|AUS}} [[Bernard Tomic]] | champgs={{Flagicon|GBR}} [[Heather Watson]] | champbd={{Flagicon|HUN}} [[Marton Fucsovics]] / {{Flagicon|TPE}} [[Hsieh Cheng-peng]] | champgd={{Flagicon|RUS}} [[Valeria Solovieva]] / {{Flagicon|UKR}} [[Maryna Zanevska]] | champwcms={{Flagicon|JPN}} [[Shingo Kunieda]] | champwcws={{Flagicon|NED}} [[Esther Vergeer]] | champwcqs={{Flagicon|GBR}} [[Peter Norfolk]] | champwcmd={{Flagicon|FRA}} [[Stephane Houdet]] / {{Flagicon|SWE}} [[Stefan Olsson]] | champwcwd={{Flagicon|NED}} [[Korie Homan]] / {{Flagicon|NED}} [[Esther Vergeer]] | champwcqd={{Flagicon|USA}} [[Nicholas Taylor (tennis)|Nicholas Taylor]] / {{Flagicon|USA}} [[David Wagner (tennis)|David Wagner]] }} The '''2009 US Open''' was a [[tennis]] event played on [[Tennis court|outdoor hard courts]], held between [[August 31]] and [[September 14]], [[2009]], at the [[USTA Billie Jean King National Tennis Center]] in [[Flushing Meadows-Corona Park|Flushing Meadows]], [[New York City]], [[New York (state)|New York]], [[United States]]. The event was originally scheduled to be a 14-day event, but due to rain at the [[2009 US Open – Men's Singles|men's singles final]] it was extended by one day. ==Seniors finals== ===Men's Singles=== {{main|2009 US Open – Men's Singles}} {{Flagicon|ARG}} '''[[Juan Martín del Potro]]''' beat {{Flagicon|SUI}} [[Roger Federer]], 3–6, 7–6(5), 4–6, 7–6(4), 6–2 ===Women's Singles=== {{main|2009 US Open – Women's Singles}} {{Flagicon|BEL}} '''[[Kim Clijsters]]''' beat {{Fl