I think you mean Alexander Suvorov, R893, and I'm not sure even he would have been confident of winning ... he spoke of Napoleon to another officer: "That man had stolen my secret, the speed of my marches"
And he wrote to his nephew :
"The young Bonaparte, how he moves! He is a hero, a giant, a magician. He overcomes nature and he overcomes men. He turned the Alps as if they did not exist ... My God, how he moves!"