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Roger Federer acknowledges the crowd after returning, and winning, at the French Open. Clive Brunskill/Getty Images Europe/Getty Images
Not surprisingly there was a packed house for Federer, who hadn't played at the event since 2015. Clive Brunskill/Getty Images Europe/Getty Images
Federer swept past Italian Lorenzo Sonego in one hour, 41 minutes and will face a lucky loser in round two. Clive Brunskill/Getty Images Europe/Getty Images
Federer signed autographs and posed for a selfie or two after the win. Clive Brunskill/Getty Images Europe/Getty Images
It was a good day too for Federer's fellow 37-year-old Nicolas Mahut, who pulled off a stunning comeback. CHRISTOPHE ARCHAMBAULT/AFP/AFP/Getty Images
The French wildcard upset 2018 semifinalist Marco Cecchinato from two sets down, then celebrated with his son on court. Adam Pretty/Getty Images Europe/Getty Images
Venus Williams, 38, got a tough draw and fell in straight sets to ninth seed Elina Svitolina 6-3 6-3. Adam Pretty/Getty Images Europe/Getty Images
Three-time grand slam champion Angelique Kerber will have to wait to complete her collection of majors. Just back from an injury, she fell to former junior No. 1 Anastasia Potapova. ANNE-CHRISTINE POUJOULAT/AFP/AFP/Getty Images
Garbine Muguruza, a former French Open champion whose ranking has dropped to 19th, rallied from a set down to beat American Taylor Townsend. Adam Pretty/Getty Images Europe/Getty Images
Greece's Stefanos Tsitsipas, having a breakout 2019 campaign, advanced in straight sets. Tsitsipas beat King of Clay Rafael Nadal recently in Madrid. Clive Brunskill/Getty Images Europe/Getty Images
