(Reuters) -Twice champion Iga Swiatek walloped Czech Karolina Muchova 6-1 6-1 to reach the Indian Wells quarter-finals on Tuesday, while Dane Holger Rune moved into the final eight of the men's draw with a 6-4 6-4 win over Stefanos Tsitsipas.

Qinwen Zheng had won just one match this year before arriving at Indian Wells. The Chinese star has somehow found her form in the California desert and has now won three consecutive matches.

Defending champion Iga Swiatek was home and dry at rainy Indian Wells on Tuesday, powering into the quarter-finals with a 6-1, 6-1 victory over Karolina Muchova.Griekspoor also made a belated start and waited out a second-set delay in his 7-6 (7/4) 6-1 victory over Japanese qualifier Yosuke Watanuki.