The 24-year-old made too many unforced errors in the opening set which enabled King, one place below Keathavong in the rankings, to take the early initiative.
However, the powerful Londoner stepped up her game in the second set and fired off 18 winners to level the match.
Keothavong's big hitting from the back of the court began to force more mistakes from King, who had also only once at SW19 before, and she took the decider to progress.



