LONDON, Great Britain - For the first time since winning Wimbledon in 2014, Petra Kvitova is back in the second week.

The No.6 seed needed just 68 minutes to reach Monday's round of 16 with a 6-3, 6-2 over Poland's Magda Linette on No.2 Court.

Kvitova cracked 23 winners to just 15 unforced errors in a clean performance, as she also proved dominant behind her serve.

The left-hander hit four aces, but landed 74 percent of her first serves and won 80 percent of the points behind them, never facing break point.

"I think I played the best tennis here today. I think that she played great game as well. She was serving much better than I was expecting actually, so it was really difficult," Kvitova said.

"I think I played pretty aggressive. It was kind of the key of it. I moved pretty well, as well. From the first point, I felt great."

World No.75 Linette, who upset American teenager and No.25 seed Amanda Anisimova in the second round, stayed steady with Kvitova over the course of the early games of the match.

The Polish No.2 saved a break point in her first service game, but proved unable to come through her second as Kvitova broke for the first time to lead 3-1 in the opener.

"She played great from the first point. I didn't really feel she's nervous," the Czech added.

"I think that she was pretty excited. That's nice that she was playing really good in those two matches. I think that she played great today, as well."

The Czech cruised on serve from there, losing just seven points in the first set overall, and ultimately wrapped up a one-set lead on her fifth set point after Linette saved four on her serve in the eighth game.

The second set proved similar to the first, as Linette saved two break points to start, but again dropped serve in her second game, before losing serve once more in the seventh game as Kvitova eased to the win.

"It's great to play just two sets, for sure, for my arm. It's the best I can have, but you really never know what is coming next," Kvitova said.

"Definitely this is the game which I showed today. I think in previous matches, as well, that's the game plan which I want to really play on the grass. I mean, if I'm just pushing the balls there, I don't think that I do have any big chance.

"With the strokes which I play today, even from the returns already was the key of it. I going to try my best to continue in this kind of performance."

After losing in the first round of Wimbledon a year ago, the two-time champion returns to week two for the sixth time in her career, adding to a run where she featured in the second week for five consecutive years from 2010-14.

For a spot in her sixth career Wimbledon quarterfinal, Kvitova will face either former US Open champion Sloane Stephens or British No.1 Johanna Konta.

"Both of them are playing different game. Jo, I think for her, the grass is really going in the good way when she's playing kind of flat shots from the both sides, especially from the backhand. I think she likes to play on the grass. Of course, the crowd will be on her side," said Kvitova.

"We played I think last year in Birmingham. I little bit know what she's playing, what she's able to do. It will be difficult match, for sure.

"The same with Sloane. I don't really have a great record against her. She's playing a little bit different. She likes to have a topspin from the forehand. She's a really great mover on the court. I didn't face her for a long time, not even on the grass. I'm not sure how her game it's been working on the grass.

"I'm really taking it very positive that I finished the match with the win, of course. That's really important for me. I'm not really looking too ahead."