She broke the Japanese second seed twice in a dominant second set, wrapping up victory in an hour and 36 minutes when her opponent sliced a backhand into the net, becoming the first top-two seed to lose in the women's first round since Martina Hingis in 2001. I answered back really well.
This was the first time Putintseva had played on Wimbledon's Centre Court, but you wouldn't have noticed as she capitalized on Osaka's error-strewn performance.
"I lost to him earlier in year [at Indian Wells]. I think there's a good logic to the formula".
But Pliskova, who won the Eastbourne grasscourt tournament on Saturday, blowing away Wimbledon champion Angelique Kerber in the final, had a tougher time on the All England Club's distant Court Two, against an opponent ranked 98 places behind her.
Since winning the Australian Open in January, Osaka's best showing in nine tournaments was making the semifinals in Stuttgart.
Six of her seven defeats in 2019 had been to players ranked outside world's top 20 while the 39th-ranked Putintseva was looking for her third top-five win of the season.
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Having thrust herself into the limelight by winning back-to-back Grand Slam titles at the USA and Australian Opens, the pressure and scrutiny that come with being among the sport's biggest stars has seemingly taken its toll on the 21-year-old.
The opening match of the tournament saw the Serbian star record a 6-3, 7-5, 6-3 win as Djokovic begins his pursuit of a fifth Wimbledon title.
In Putintseva, however, Osaka faces a tricky opponent who has beaten the Japanese in both of their two previous meetings, including at the Birmingham grasscourt warm-up event last month.
Earlier, defending champion Novak Djokovic got his campaign for a fifth Wimbledon title off to a winning start on Monday with newly-hired coaching team recruit, and 2001 victor, Goran Ivanisevic helping steer the ship.
Victory made the 19th seed the first player born in the 2000s to win a match at Wimbledon. The three-time Grand Slam singles champion, who has won each of the other three majors but never Wimbledon, defeated Belgian qualifier Ruben Bemelmans 6-3, 6-2, 6-2.
Stan Wawrinka, seeded 22nd, also advanced. - Venus Williams after her defeat to Cori Gauff. Not only is Gauff the youngest, but the American is also the youngest player in the professional era to reach the main draw at the All England Club by going through qualifying rounds.