The German language edition of "Wikipedia" notes in its article regarding the Grasshoppers, that in 1931 the club was voted the "fourth strongest European side by football experts from all over Europe". After Kürschner's departure from Switzerland the legendary Austrian Karl Rappan followed the Hungarian on the bench and expanded on the success of the club until 1948. Rappan was also a founding father of the European cup competitions. He arrived in Rio de Janeiro in March 1937 and within a month saw himself at the helm of CR Flamengo which was then the team of the legendary striker Leonidas da Silva, the famous "Rubber Man". At the "Mengão" he succeeded Flávio Costa who had been player-manager from September 1934 until January 1937. Costa became Kürschner's assistant and eventually his successor. Beyond this, Costa should once be regarded the probably greatest coach in Brazil in the earlier parts of the 20th century. He was to amass titles not only with Flamengo and local rivals CR Vasco da Gama, but he also led the Brazilian national football team to its then only third Copa América title and even to the, albeit for the local audience anticlimactical, second place in the World Cup finals of 1950. Kürschner promoted a more controlled, defensive style of the game in Brazil. He introduced not only things like training without ball, but most importantly also the WM system, which had been in use in England since the 1920s. In the course of the preparations for the World Cup 1938 in France – where Brazil was to debut amongst the top four – he familiarized the coaching staff of the association with state-of-the-art European football and training methodology. His time with Flamengo came to an end on matchday one of the Campeonato Carioca campaign 1938 on 4 September – a match that was also used for the opening of the club's new Estádio da Gávea. Flamengo lost 0–2 to Vasco da Gama. This triggered a crisis and led to the almost instantaneous sacking of Kürschner. Later on in 1939 Kürschner was hired by Botafogo FR, then based in a district close by to Flamengo, where he achieved a third consecutive second place in the Championship of Rio. He nevertheless was let go from Botafogo in August 1940. In April 1941 he was one of the contenders for the coaching position of the Canto do Rio FC of Niterói on the other side of Guanabara Bay when the club prepared for joining the Rio Championship.