Serena Williams

It is expected to be the final match for the 40-year-old, who announced her plans to retire last month and have a second child, ending a 27 year career.

The US Open is set to be the final tournament of Serena’s career, and she is giving herself two shots at success.

Williams fell to 0-2 in matches since announcing 'the countdown has begun' on her career, losing 6-4, 6-0 to Raducanu in Cincinnati on Tuesday night.