Iga Swiatek battled into the third round of the US Open on Thursday, needing three sets to edge past the Netherlands' lowly ranked Suzan Lamens.

Second seed Swiatek advanced to a meeting against Russia's Anna Kalinskaya with a 6-1, 4-6, 6-4, victory in two hours and six minutes on the Arthur Ashe Stadium court.

The Polish ace -- the pre-tournament betting favourite -- had looked to be romping through to the next round after rattling through the opening set in 30 minutes.

Swiatek then appeared poised to wrap up a straightforward win after breaking Lamens for a 4-3 lead in the second set.

Yet Lamens, the world number 66, broke back immediately to make it 4-4 when Swiatek double-faulted on break point in the next game.

Lamens held serve and then broke Swiatek for the third time in the ma

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