Complex sentence: Though the match ended with Tezuka's complete defeat, Fuji was displeased with the outcome after finding out Tezuka did not play in his best form due to his arm injury, so they promised to play each other once again after Tezuka's arm completely heals.
Split into simpler sentences: Though the match ended with Tezuka's complete defeat, Fuji was displeased with the outcome after finding out Tezuka did not play in his best form due to his arm injury. They then promised to play each other once again after Tezuka's arm completely heals.