wild card entry

• underdogPresumed loser beforehand
• dark horseUnlikely but possible winner
• upsetDisturb, topple, or shock
• qualifierWord or phrase limiting meaning
• tournamentMulti-round competitive event

bracket · surprise · longshot · unexpected · joker · trump · unpredictable · slot · invitation · spot · contender · outsider · chance · unseeded · draw · rookie · newcomer · sleeper