Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The 2003 Tennis Masters Cup was a tennis tournament played on outdoor hard courts. It was the 34th edition of the year-end singles championships and the 29th edition of the year-end doubles championships, and was part of the 2003 ATP Tour. It took place at the Westside Tennis Club in Houston, Texas in the United States from November 8 through November 16, 2003. The Barclays ATP World Tour Finals is a tennis tournament played at the end of each year, involving the top eight players in the men's tennis world rankings.