unchallenged

adj

1. Not having any challengers.

   “Roman Sharonov rose unchallenged to head a corner wide, while diminutive winger Gokdeniz Karadeniz ghosted in with a diving header from the edge of the six-yard box that was acrobatically kept out by Gomes.”

2. Lacking experience due to lack of challenges; untested.
3. Undisputed, not called into question.

   “Many of his crazy ideas remained unchallenged.”

   “The intruders went unchallenged.”