Reigning women’s champion Swiatek recovered from a second-set blip to battle past Taylor Townsend 6-1, 2-6, 6-3.
Last year, she bounced back after losing her French Open crown by romping to a maiden Wimbledon title but she was far from her best 12 months on against Townsend.

The Pole made 16 unforced errors in a poor second set, but managed to take a tense decider to set up a second-round meeting with former World No.1 Karolina Pliskova on Thursday.