Serena Williams prepares to serve to Romania’s Irina-Camelia Begu during their first round match on day two of the French Open. (AP Photo/Michel Euler)
Switzerland’s Roger Federer plays a return to Uzbekistan’s Denis Istomin during their first round match on day two of the French Open tennis tournament at Roland Garros in Paris, France, Monday, May 31, 2021. (AP Photo/Thibault Camus)
PARIS — They have been on often-parallel tracks for two decades and as they close in on the big four-oh, Serena Williams and Roger Federer still cannot break the habit.