Juan Serra, the goalkeeper of "C.N. Sabadell" has been the goalkeeper of Spain into the London, 1948 Olympic Games. Juan Serra has been along with Antonio Bayarri of C.N. Barceloneta, the first players selected for the National team, while not belonging to "C.N.Barcelona".
In the photo Juan Sierra saves a shot during the London 1948, Olympics.
Source:Historia del Water Polo Espanol; Juan Antonio Sierra.