Dubai - Top seed Simona Halep needed four match points to see off Tunisia's Ons Jabeur on Wednesday, squeezing into the quarter-finals of the WTA Dubai Championships 1-6, 6-2, 7-6 (9/7).
"It was up-and-down because she doesn't give rhythm. It was very weird, but I'm happy I could win."
The tense Halep match resembled a Fed Cup tie, with rival groups of Tunisian and Romanian fans out-shouting each other.
"Everyone was with a lot of energy so we had to give our best. I think it was a great match."
"It was a very tough match, she played well," Halep said. "I wanted to give all I had and just wanted to win. I didn't give up, I'm proud I fought to the end."
"It's always a tough one against her. We played in Australia, so I knew what to expect," Pliskova said.
Muguruza went into her match two days after beating Kim Clijsters in the Belgian's first WTA match since 2012.
"But I'm excited that I gave myself another opportunity to be in the quarters."
"Honestly, the difference is very, very small, I'm just pleased to go through."