"Probably I wanted too much again", she told reporters.
Her opponent, the 21-year-old Russian, was a tricky but inconsistent player with only one grand slam event win to her name. She contested the decision but let her tennis do the talking against the Frenchwoman, winning 7-6 (7-4) 6-1.
The world number 132 battled back to win 6-7 (3-7) 7-6 (7-3) 6-4. Then Cameron Norrie was knocked out by the former British player, now reverted to his native Slovenia, Aljaz Bedene, in a late-night four-setter.
Johanna Konta had a breakthrough run here a year ago to reach the semis and rise to No4 in the rankings. She would be defeated by Venus Williams in the semi-finals, but that run had sealed her place in the hearts of an enthralled public. "She has a big game". However, with so many points to defend, there was some pressure to perform well.
The tennis star took time out of her busy preparations to speak to Newsround. It was the five-time Major winner's first match at the All England Club since 2015.More news: Hormuz Strait either for all, or for none: Iranian commander
"For me at Wimbledon there are some nerves but I enjoyed every second and was going to make sure I fought very hard every point".
"That's part of the game, is to feel moments of tension, to feel there's something on the line", Sharapova said.
Nadal moved into the second round with a 6-3, 6-3, 6-2 win over Dudi Sela of Israel, while Djokovic eased past Tennys Sandgren of the United States 6-3, 6-1, 6-2. But Vikhlyantseva levelled, saved another set point, but Konta would finally seal the win after an hour and three-quarters at the sixth attempt, 7-6 (7).
Cibulkova is still seething about being denied a seed, but that anger alone might not be enough to get her past Konta.
"I'm looking forward to that challenge".
But Max Eisenbud, Sharapova's long-time agent - a controversial figure and the man credited with helping amass her commercial fortune - was the most vocal, shouting "come on baby" and "can you hit the ball?" when she slapped one into the net.More news: YouTube stars have died after falling into a waterfall pool in Canada
The Spaniard failed to build upon her dominant display at last year's Wimbledon as she exited the U.S. Open in the second round and this year's Australian Open in the fourth.
"She played extremely aggressive", Sharapova said of Diatchenko, who handed the 31-year-old the only first-round Wimbledon loss of her career.
"I just didn't feel well obviously". This year, she leads the WTA Tour in match victories with 38. She went for her shots, served with pace and variety and played a practically flawless decider making two unforced errors to close out a 6-4, 4-6, 6-0 match.
"I don't know her very well at all but I practiced with her once", she said. "You want to do well at your home tournament, especially when it happens to be the best tournament in the world". Kvitova also lost in three sets to world number 50 Aliaksandra Sasnovich.
Diatchenko took a medical timeout with the match tied at 3-3 in the opening set before No. 24 seed Sharapova, the 2004 champion in London, clinched the tiebreak with a powerful serve.
Immediately after the match Alexander Sasnovich had a call from Belarusian President Alexander Lukashenko who congratulated her on the win.More news: Marcelo trains with Brazil ahead of Mexico last-16 clash
Jelena Ostapenko, the 2017 Roland Garros victor, starts against Britain's Katy Dunne.