This gives the Swedes revenge after the world No. 213 Haug surprisingly knocked out world No. 4 Truls Möregårdh yesterday.
I saw what kind of game he played yesterday, so I was fully prepared for a really tough match, says Källberg.
The Swedish table tennis star will face Germany's Dang Qiu in the semifinals tomorrow at 1:45 p.m.
However, Källberg has not finished playing for the day - the men's doubles final awaits tonight.