The Swedish star got off to a strong start against China's Chen Yuanyu and took the first three sets of the match.
However, Möregårdh had to fight a different battle - the air conditioning.
In the middle of the second set, the Swede completely misjudged a ball and seemed irritated.
"Oh! Now it's starting to get windy. There's so much wind; those two balls came out of nowhere," he said on the television broadcast.
Despite the worries and poorer flow in the latter part of the match, which he was close to losing, Möregårdh was finally able to win 4–3 in sets and advance to the semifinals.
He will face Taiwanese Lin Yun-ju on Sunday.
