"I can't support this because I don't feel the matches that stay for the history of our sport went that quick".
He said: "It inspires me, it inspires a lot of players: after all have achieved, the titles won, coming back from injuries and still managing to get to the top spot of the world and still winning the biggest tournaments in the world".
He said there was still "room to improve" but was happy to advance.
Nadal breezed past Mikhail Kukushkin in straight sets on Centre Court on Thursday - but was hit with two time violations.
"They are trying to make us faster", he told reporters.
It wasn't such a bright start for two-time former champion Petra Kvitova, the eighth seed slumped out of Wimbledon in the first round, beaten by inspired world number 50 Aliaksandra Sasnovich of Belarus 6-4 4-6 6-0.
Not only has Federer not lost a set in the tournament so far, and not only hasn't he been broken so far, he hasn't so much as faced a single break point.
Baghdatis was leading 6-4 7-5 2-0 when Thiem retired.
The US Open has made a decision to introduce a shot clock this year so that the 25 seconds allowed between points is strictly enforced and Wimbledon is likely to follow suit.
Zverev recorded his best Wimbledon performance a year ago by reaching the round of 16.
And unlike some of his rivals, Edmund's early start meant he was finished in time to take in coverage of England's World Cup last-16 meeting with Colombia. I'm positive for the guys today. "All the best to England".
But there was a sense of inevitability about Muguruza breaking at 6-5, and she did to love, as she booked her place in the second round.
Up next for the 24th seed is Australian Bernard Tomic, who ousted Poland's Hubert Hurkacz in the opening round.
Three-time victor Djokovic starts against Tennys Sandgren of the United States, returning to the tournament which ended in an injury-enforced quarter-final withdrawal 12 months ago.
"First rounds are always tricky", she said. "But is something that is not bothering me", the Spaniard said when asked for his opinion in his news conference after a 6-3 6-2 6-2 win over Sela which took less than two hours on Centre Court.