Underestimating your opponent in chess

Lots of chess players underestimate their opponent in chess. They think the player will be 'easy' because the player is young, unrated or has a lower rating then you. I too have underestimated players and learnt that rating or age does not matter. Try reading this article about Samuel Reshevsky, age 8, defeating several chess masters at once in France, 1920. This is the link http://rarehistoricalphotos.com/samuel-reshevsky-age-8-defeating-several-chess-masters-france-1920/