Emma Raducanu missed three match points as former Wimbledon champion Barbora Krejcikova fought back to reach the Korea Open quarter-finals.
British number one Raducanu will be left to rue a missed opportunity after losing 4-6 7-6 (12-10) 6-1 in two hours and 52 minutes.
Raducanu served for the match at 5-3 in the second set, having led it 4-1, and held a match point in that game.
However, Krejcikova broke Raducanu back and forced a tie-break – which Raducanu initially seemed to have dominated.
After racing out to a 5-2 lead, Raducanu found herself with two match points on the Krejcikova serve, but could not convert and the former world number two held firm to force a decider.
Krejcikova, ranked 39th in the world, saved two break points in the third game of the deciding set before reeling off five successive games to secure victory.
The Czech will face world number two Iga Swiatek of Poland in the quarter-finals.
Reigning Wimbledon champion and top seed Swiatek was a 6-3 6-2 winner against Romania’s Sorana Cirstea earlier on Thursday.
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