Catherine Barclay (born 12 June 1973) is an Australian professional female tennis player.
Barclay's parents were the owners of a tennis facility in Sydney, she began playing tennis at the age of eight.
In her Junior career she was a winner of the Wimbledon Girls Doubles and also a Quarter finalist in Singles at both Wimbledon and the Australian Open.
In her Senior career she won three ITF titles in single and 30 in double.
She was also a Quarter finalist in the Wimbledon Doubles and Mixed Doubles events.
In the 2002 season, she won two double titles on the WTA Tour.
In 1999 she was to the Australian Fed Cup Team. She was able to win all three ties contested.
On 30 August 2000, she was awarded the Australian Sports Medal for her strong commitment to tennis.
In 2004, she played her last games on the Tour.
Since 2003 she is married to the German hockey player Christopher Reitz and resides since 2005 in Sydney, Australia.