"It has a lot to do with the strength of your body, your style of game, but for me, it's incredible".
The Spanish 14th seed produced a powerful display of hitting in saving two set points in the first set before progressing to dominate the match against the fading seven-times Grand Slam winner Williams by reeling off nine straight games as the women's showpiece final ended in a sense of massive anti-climax.
Martinez said that Muguruza had focused on "every point of every single match" she had played over the last fortnight here and hopes she will do the same elsewhere. Muguruza's defence was relisient, and her competitive will tougher still.
"She competed really well".
Muguruza has been working with 1994 Wimbledon champion Conchita Martinez during the tournament but thinks it is her own past experience of grand slam finals that has her better prepared as she seeks to secure a second major crown.
"I'm human", Muguruza said, looking back at the tears she had shed in Paris. It was on view for the world to see on Saturday. Williams hadn't made it this far at the All England Club since 2009, hadn't won the title since 2008.
It ended when Williams hit a shot that landed long, but was ruled in. "That mentally is very strong and you can see players break down with that".
Muguruza needed one hour, 17 minutes to secure the win and end the 37-year-old Williams' attempt to become the oldest woman in the Open era to win a Grand Slam title. "I'm super-passionate about it and I love it. But I always like to cook, I like music, and I just try to be like a regular girl or woman".
People drink champagne with a strawberry in at the Wimbledon Tennis Championships in London, June 29, 2015.
Those fans who opted for Rafa Nadal's fourth round match with Gilles Muller were at least treated to a genuine upset with the Spaniard beaten by the inspired journeyman from Luxembourg in a five-set classic.
"At the beginning you know I didn't like grass", said Muguruza.
She added: "I think my mind is more equipped this time because the more experience you get, the more you know how to deal with these situations, because they're very special".
And when Martinez discovered Muguruza had beaten Williams in Rome this year, just as she had beaten the 37-year-old Navratilova in the Italian capital, the coincidences became too much.
"I feel incredible to be able to play her here".