In 1942 a Closed French Championships was announced and the doubles was won by Cochet and Bernard Destremau. In 1943 he reached the singles finals in the same nationals losing it to Yvon Petra. He also participated in charity matches to raise funds for the prisoners of the Axis powers. The next year Cochet met Petra for the title and lost for the second consecutive time. In the last wartime championships of France he won the doubles title alongside Pierre Pellizza. Despite being a reinstated amateur he was still ranked 9th in the first official pro rankings published by the World's Professional Tennis Association in 1945. After the End of World War II in Europe he played his first international match in Paris against Bill Sidwell, which he easily won.