"Not long after I heard Serena told a friend, who then told me, 'I'll never lose to that little b***h again".
On the match Sharapova admitted that Muguruza was superior: 'I think she did a lot of things better than I did. "My head won it".
Spain's Garbine Muguruza has yet to drop a set in the tournament. The victor earns a berth in the final at Roland Garros - plus the No 1 ranking that now belongs to Halep. Despite her many triumphs, Halep seems to need extra effort to win a game with both her mind and body together.
The women got their matches done before rain arrived at Roland Garros, leaving the men's quarterfinals suspended in progress.
Muguruza is yet to drop a set in the tournament but she is expecting a tougher test against last year's runner-up Halep on Thursday.
Nadal lost the opener 6-4 against 11th-seeded Diego Schwartzman but began to play better after a rain delay of just under an hour.
Halep is aware she can not afford another poor start on Thursday against 24-year-old Muguruza who has been tested just once in Paris and that was in the first round where fellow former victor Svetlana Kuznetsova pushed her to a tiebreak in the first set.
By the end of the first set, the 5-time major victor had won just 8 points against the Muguruza serve and failed to carve out a single break point.
Keys has reached the quarter-finals in her last three consecutive Grand Slams as the 23-year-old continues to make strides ahead at the highest level.
"It's not that important, because it's constantly this thing going on", said Muguruza.
On Wednesday, Halep looked anything but the top seed, slipping 4-0 down in the first set before she rallied to defeat Kerber, a two-time major victor who had exited in the first round in Paris in the last two years.
Sharapova certainly didn't do that. Sharapova had 27 unforced errors and had her serve broken six times.
Muguruza looked dominant in the win over Sharapova, winning in straight sets 6-2, 6-1. Muguruza essentially got that round off, too: Her opponent, Lesia Tsurenko, quit with an injury after only two games.
"Kind of a weird day", Muguruza said.
Muguruza is 3-0 in career grand slam semifinal matches.
Halep, meanwhile, has participated in a trio of major finals, losing each. Sharapova was the French Open champion in 2012 and 2014; Muguruza took the trophy in 2016. Ironically, perhaps, the only one missing is the Slam everyone expects her to someday win: Wimbledon.
Like Sharapova, Halep trailed 4-0 at the outset. "She had a lot more depth in the ball".
And sure enough, we have seen a more tenacious Halep at play over the previous year, despite the glaring hole of two Grand Slam runner-up trophies in the space of eight months.
"I don't think you have to be mean in order to win matches".