Top seed Casper Ruud of Norway suffered a shock defeat to Spain’s Jaume Munar in the first round of the ATP Japan Open on Tuesday. In other matches, South Korea’s Kwon Soon Woo produced another upset by eliminating sixth seed Alex de Minaur of Australia 6-3, 6-2. reports Xinhua. Fifth seed Nick Kyrgios of Australia breezed past Chun Hsin Tseng …
