Stan Wawrinka, 34, pulled a crying boy out of a crush of autograph-seekers in the stands. Anyone assuming the fortnight will culminate with a battle between Rafael Nadal and Novak Djokovic might have jumped the gun.
Federer, wearing pale brown shorts, turned the screw just enough, breaking serve at a crucial juncture of each set for a clinical, yet still eye-catching 6-4, 6-3, 6-4 victory.
Ruud is the son of a player named Christian who featured in the 1999 French Open when the Swiss star made his debut.
"But, you know, I don't think he had won any Slams at that point when my father practiced with him, so I don't think my father put too much into it himself".
Later on Wednesday, 20-time Grand Slam title victor Federer continues his Roland Garros return after a four-year absence against German lucky loser Oscar Otte.
Better hope no one tells Roger.
"He (Maden) is a good player".
Afterward, Wawrinka came to the rescue of one of his tiniest fans, lifting him away from danger and offering a towel as a keepsake.
Stefanos Tsitsipas and Kei Nishikori were among the other winners, while Benoit Paire took the final set against Pierre-Hugues Herbert 11-9 in a marathon all-French encounter. "He was in pain and sad".
In the next round Nadal will face 27th seed David Goffin, who saw off Miomir Kecmanovic 6-2 6-4 6-3.
The 37-year-old Federer held off a persistent world number 144 Otte, saving all four break points he faced in a 6-4, 6-3, 6-4 win on Court Philippe Chatrier.
"Once I got myself into the right mindset, things seemed to flow my way", said 20-year-old Tsitsipas.
"It was more trying to go back in time a little bit to the '70s, you know, and haven't worn brown ever and cream", he said. "And that's the only thing that really matters".
Djokovic, Federer, Nadal, Dominic Thiem and Alexander Zverev make up the top five contenders in the men's singles field, while Williams rounds out the top 10 on the women's side.
"Vomiting. Diarrhea. All night long, all day long". I had some sleep, and I just wanted to give it a try, but then as soon as I start warming up right before the match, it started again. "There was not any energy left". Kenin will face the victor of Thursday's match between Serena Williams and Japanese qualifier Kurumi Nara.