After a tricky 6-3, 6-4 first-round victory over world No. 1 doubles player Katerina Siniakova last Monday, Swiatek has been barreling through the draw, following that up with a 6-0, 6-2 victory over Rebecca Sramkova in the second round and a 6-1, 6-0 win over former US Open champion Emma Raducanu in the third round.
And she was as dominant as ever in the fourth round on Monday night, winning the first nine games in a row for a 6-0, 3-0 lead before Lys, who got into the main draw here as a lucky loser, finally got on the board with a hold of serve to make it 6-0, 3-1.
Swiatek then won three more games in a row to close it out.
She finished the match with 28 winners in 59 minutes.
The world No. 2 has only lost four games across her last three matches, but things will likely get much tougher in the next round as she faces her first Top 10 foe of the tournament—awaiting her in the quarterfinals is the world No. 8, Emma Navarro, who outlasted another Top 10 player, No. 10 Daria Kasatkina, 6-4, 5-7, 7-5.