
Noppawan failed to win her first Slam singles trophy
The top seed blew away a 4-2 lead in the opening set before the fifth seed Robson turned the tide to win the match after 73 minutes of play.
Robson stamped her authority over the Thai whom she beat in three sets for the Wimbledon junior title last year.
However, Noppawan still has the doubles semi-final to compete as she and Indonesian Beatrice Gumulya are to meet Serbian Alexandra Krunic and Poland's Sandra Zaniewska later today.