Grand Slam champs Swiatek, Kvitova, Kerber headline Ostrava draw
Olympic champion Belinda Bencic and former French Open winner Jelena Ostapenko are also in the draw
2020 Roland-Garros champion Swiatek is the top seed in the 28-player draw with the top four seeds having byes in the first-round. The Pole is followed by Kvitova, Olympic gold medalist Belinda Bencic and Maria Sakkari, who reached the semi-finals at the French Open and US Open this year.
Sakkari could face former French Open champion Jelena Ostapenko in the second round if the Latvian is able to get past a qualifier in the first round.
Sixth seed Kerber faces a tough first-round against Swiss left-hander Jil Tecihmann, who reached the finals in Cincinnati last month.