Norway's Casper Ruud reacts after losing a point during his first-round match against Spain's Jaume Munar at the Rakuten Japan Open at Ariake Tennis Park in Tokyo on Oct. 4, 2022. (Kyodo)

TOKYO - The top seed and world No. 3, Casper Ruud of Norway, bowed out in the first round of the Rakuten Japan Open at the hands of Spain's Jaume Munar on Tuesday.