Roger Federer won his 56th French Open match while Serena Williams racked up a 26th consecutive win as the former champions showed no mercy to hapless opponents at Roland Garros on Wednesday. Federer, the second seed, trounced Indian qualifier Somdev Devvarman, ranked 188 in the world, 6-2, 6-1, 6-1 and next faces France’s Julien Benneteau. It was Federer’s most one-sided win in Paris since he beat Belgium’s Kristof Vliegen in the first round in 2004, also for the loss of just four games. The Swiss great’s latest French Open victory took him to 56, just two behind the tournament record held jointly by Guillermo Vilas and Nicola Pietrangeli. “It’s great that all the work is paying off and I hope to keep experiencing this as long as possible,” said the 2009 champion. Women’s top seed Williams cruised to a 6-1, 6-2 win over French teenager Caroline Garcia, conceding just seven points on her serve. The 31-year-old American, who will face Romania’s Sorana Cristea, the 26th seed, for a place in the last 16, has dropped just four games in two rounds. “I felt I was doing well, being serious and getting the job done,” said Williams. “I like the clay…