Emma Raducanu was made to wait at the rain-hit Korea Open on Wednesday before setting up a meeting with fellow former Grand Slam champion Barbora Krejcikova.
Britain's Raducanu, the 2021 US Open winner and eighth seed in Seoul, came back from 1-3 down in both sets to beat Jaqueline Cristian of Romania 6-3, 6-4.
The first-round match was originally scheduled for Tuesday but was pushed back by heavy rain in the South Korean capital.
"It hasn't been easy, I feel like I've played this match for the last three days," Raducanu said afterwards.
Coming out on 🔝@EmmaRaducanu digs deep for a straight sets victory against Cristian, 6-3, 6-4.#KoreaOpen pic.twitter.com/5yYNMqAAea
— wta (@WTA) September 17, 2025
She next plays Czech Krejcikova, who won the 2021 French Open and last year's Wimbledon crown.
Top seed and six-time major champion Iga Swiatek faces Romania's Sorana Cirstea on Thursday as the Pole gets her title bid under way.