After the match, she was asked if she had a message for Serena, who is home awaiting the birth of her first child. Previously these two players mat each other four times in various matches such as Rome Masters, Wuhan, Auckland and Florianopolis. She lost the first, in Australia, to her sister Serena.
The apology came as Venus watched on, apparently not amused at the sizeable age gap being pointed out, despite the crowd's audible laughter. For a player whose services had carried her throughout the tournament, it was a bad situation for her to be in.
"The first set was the key, because the game was equal and, of course, to win it was very important".
However, she hasn't conquered the All England Tennis Club yet, losing in the 2015 final to Venus' sister Serena in straight sets.
That three-game sequence seemed to break the resolve of the American who, trying to become the oldest woman to win Wimbledon for 109 years, lost the second set to love in an equally astonishing turnaround.
"When I had those set points against me, I'm like, 'Hey, it's normal".
She has rediscovered both her best tennis and her winning smile during the last fortnight and Muguruza has perhaps shown that she is the player best capable of carrying women's tennis forward when the Williams sisters eventually head off into the sunset.
Below is all you need to know to watch Saturday's action from The Championships, on television and online.
The ladies competition concludes with this match, and we have to say that at the end, we saw a very quality tournament, with a lot of fantastic games which are going to be the subject of debates for quite some time.
This time, with the Centre Court roof closed because of rain earlier in the day, the 23-year-old was too good down the stretch.
Immediately at the start of the second set, the Spaniard took the serve from Venus and in the rest of the match, the 37-year-old couldn't do anything against the fantastic game of her opponent. Venus is 5-3 in her career in final appearances on grass.