Seven-time champion Serena Williams reached the Wimbledon quarter-finals with a straightforward win over Russian qualifier Evgeniya Rodina.
In what was a rare meeting between mothers at this stage of a Grand Slam tournament, Williams was in control throughout a 6-2 6-2 victory.
Rodina, whose left thigh and right knee were taped, often moved slowly and could not deal with Williams’ power.
The American, 36, faces Italian world number 52 Camila Giorgi next.
Defending champion Roger Federer outclassed France’s Adrian Mannarino to reach the Wimbledon quarter-finals without dropping a set.
Federer, 36, won 6-0 7-5 6-4 against the 22nd seed on Centre Court, and has now won 32 consecutive sets at SW19.
He will play South African eighth seed Kevin Anderson in the last eight on Wednesday.
The top seed is bidding for a joint record ninth singles title to draw level with Martina Navratilova.
Federer served out the match with an ace out wide, winning in one hour and 45 minutes.
The Swiss is two sets short of his all-time record streak, which he set between the third round in 2005 and the final in 2006.
“I wouldn’t know that it happened in ’05 and ’06, I feel like these streaks just happen,” he said.
“I’m equally happy if I would have won all the matches in four sets. That it happened to be in straights, it helps me for to save energy for the rest of the tournament.”