Guernsey squash star Chris Simpson failed to make it through the first round of Torneo Sporta PSA tournament in Guatemala.
Simpson, who was seeded third for the event, lost 3-1 against unseeded Mexican Eric Galvez.
Simpson told BBC Guernsey: "It's 1850m altitude here and I just couldn't get any oxygen into my lungs.
"The Mexicans, who all live in Mexico city which is higher than here, all seem to be beating everyone else."
He continued: "I've been a bit disappointed with my run of form in tournaments in the last couple of months.
"But I have been feeling good in training, which is a bit strange."
Simpson who is ranked number 48 in the world, is not part of Guernsey's team for next month's Island Games, owing to other commitments.