Anne Keothavong beat fellow Brit Heather Watson in straight sets to reach the main draw of the Qatar Open.
The British number two, 28, who beat another British teenager, Laura Robson, in Saturday's first qualifying round, eased to a 6-4 6-4 win over Watson.
It was the pair's first professional contest and Keothavong, who won two titles at the end of last season, was always in control of the match.
Belarusia's world number one Victoria Azarenka leads the field in Qatar.
Keothavong, Watson and Robson teamed up last week to help Britain's Fed Cup team reach the World Group II play-offs.