[1] He "excelled in the art of stopping a dribbling or intercepting a pass" by imposing himself in duels, probably an influence from rugby, and also had "superb clearance kicks", which means that he powerfully cleared the ball on the volley.

[1] Together with the Carlier brothers, Henri Guerre, and Eugène Maës, he played a crucial role in helping Olier win the FGSPF Football Championship in 1908, and this victory allowed the club to compete in the second edition of the Trophée de France in 1908, an inter-federation national competition organized by the CFI, in which he started in the final as a halfback, helping his side to a 3–0 win over SM de Puteaux, the Parisian champion of the FCAF.

[1][2][3][4] Along with goalkeeper Louis Tessier, they formed a decent defensive partnership that held up very well, until 10 minutes from the end, during which they conceded four goals due to the fatigue of certain players; France lost 2–5 loss.

[9] While Guerre lost interest in football fairly quickly, Tossier kept playing regularly not only until 1914, but also after the First World War, until at least 1921, being always faithful to his patronage and to the complete amateurism that reigned there.

[1] Ernest Tossier was a designer and watercolorist for the Arthus-Bertrand workshop, which is responsible for embroidering military badges, creating medals, and the preservation and restoration of the Coupe de France trophy.