Naoya Inoue avoids early disaster and stops Ramon Cardenas inside eight

• Japanese superstar remains unbeaten after TKO 8 win
• Inoue bolsters claim as world's best pound for pound

Naoya Inoue remained undefeated after retaining the undisputed junior featherweight title with an eighth-round technical knockout of Ramon Cardenas on Sunday night in front of a packed house inside T-Mobile Arena and a nationally televised audience on ESPN.

Inoue (30-0, 27 KOs), who was knocked down in the second round, played the aggressor much of the fight by using precision and power to carve his way through Cardenas (26-2), frequently sending the announced 8,474 gathering into a frenzy.