Seven-times champion Serena Williams prevailed in a Centre Court mothers' meeting on Monday, roaring past Russian qualifier Evgeniya Rodina into the Wimbledon quarter-finals.
The 36-year-old American was untroubled in a 6-2 6-2 victory -- her 90th singles match win at the All England Club.
Rodina, who like Williams combines a tennis career with motherhood, looked overawed at first as she went 3-0 down.
She steadied herself, though, and even had a break point when Williams served at 4-2, but her chances were few and far between as her opponent continued to charge through a draw blown wide open by an exodus of seeds.
Rodina left the court for a few minutes at the end of the first set but when she returned Williams continued her domination with an early break in the second.
With her easy power Williams looked serene as she cruised to victory to set up a clash with Italy's unseeded Camila Giorgi who beat Ekaterina Makarova.
"I'm a perfectionist, I always find something," the 36-year-old responded when asked about her near-flawless display.
"Today was tougher than the scoreline suggested."
Williams, who missed last year's Wimbledon because of pregnancy, has not lost here since 2014 and has now won 18 consecutive matches on the London lawns.
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