She's coming back and for me also I'm coming back from 2017. 'I think it doesn't matter against who she is playing.
"I lost count after, like, four surgeries", said Williams, who has been wearing compression leggings this fortnight as a precaution.
The German attacked the biggest chink in Ostapenko's armour - her second serve, which is weak and ineffectual.
She opened with a double fault and won the next point with a bludgeoning forehand of breathtaking audacity, a pattern that left the audience gasping at her free-flowing brilliance and then gasping again at her appalling blunders right through the game. Today was, unfortunately for her, a case of the latter.
For Kerber, it was clear right from the opening game how things were going to go against Ostapenko.
Serena Williams celebrates after winning against Italy's Camila Giorgi during their women's singles quarter-final match on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, London, July 10, 2018. After Kerber had her serve broken in the second set, Ostapenko powered back to take another game, but Kerber was able to complete the sweep when Ostapenko fired two serves back into the net and returned the final volley outside the lines on match point.
Kerber has already made the semifinal of the Australian Open and the quarterfinal of the French Open this year.
There were no drawn-out points in the early going, no lengthy baseline exchanges, essentially because Ostapenko wouldn't allow it. She had 14 winners and 10 unforced errors, while Kerber had three winners and - this was key - zero unforced errors. Against the No.25 seed, Goerges would need to raise the tempo, to move her opponent outside her comfort zone but the 23 time Slam champion confirmed to be the most complete player ever.
Two-time Grand Slam champion Kerber remained solid amid an onslaught of winners and unforced errors from the more aggressive Ostapenko. Ostapenko's strokes were missing and she grew increasingly frustrated, slapping a thigh after a miss or leaning forward and putting her hands on her knees after others.
Ostapenko entered the semifinal match having yet to lose a set. By the time she flubbed a backhand while falling behind 5-1 in the second, she dropped her racket and screamed.