Martin Klizan needed a third-set tie-break to get past Alexei Popyrin at the Sydney International.
Martin Klizan edged Alexei Popyrin in the Sydney International first round, while Jordan Thompson advanced on Sunday.
Klizan was pushed by teenager Popyrin before scraping through 7-6 (7-4) 4-6 7-6 (7-5) at the ATP 250 event.
Australian wildcard Popyrin was left to rue a slow start to the final-set tie-break, losing the first five points before being unable to recover.
In the day’s only other main-draw match, another Australian wildcard, Thompson, was too good for Adrian Mannarino 6-3 6-3.