Entering Tuesday's first-round match, Nadal was working on an 0-for-3 streak on the green stuff, including his most recent loss, to Dustin Brown a few weeks ago in Halle, Germany. Nadal had won only one of five previous matches on grass.
"As the years have gone by, as he gets older, the French has taken an extraordinary amount of energy out of Rafa," Mary Carillo, the Tennis Channel and NBC tennis analyst, said before the fortnight began at Wimbledon. "You're always wondering how he's going to come out of Paris."
Although the score line might suggest otherwise, Nadal was challenged closely by Klizan in the 2-hour, 55-minute match.
If each is fortunate to win his first five matches, no small feat, Nadal and Federer would meet in the semifinals. It would be their 34th meeting (Nadal leads the series 23-10) and the 12th in a Grand Slam.
They have won 31 Grand Slam singles titles between them; Federer is first among men with 17, and Nadal (14) is tied for second with Pete Sampras.
At the age of 32, Federer is bidding to become the first man in history to win eight Wimbledon titles. Sampras and William Renshaw each has seven.
"I think [Federer's] one of the favorites in this tournament," said BBC analyst Tim Henman, who was Great Britain's hope before that guy named Murray. "On grass, given the way he moves and the offensive choices he has, I give him a good chance in this fortnight."
If he is to do it, he's going to have to move forward the way he did against Lorenzi. Federer made a conscious effort to be aggressive and won 30 of 42 points at net (71 percent). His new coach, six-time Grand Slam champion Stefan Edberg, has reinforced this idea.
"I think it could be that little extra piece to the puzzle that could bring me through, to have that extra option," Federer said. "I think also the [larger] racket is helping me to serve overall more powerful, higher percentage. I'm going to still see against who I can do it and who I can't."
Although Federer has now won some 269 Grand Slam matches, Lorenzi is 0-for-13. Going forward, it will be more difficult ? to go forward.