Related Clues:

• Foe
• Antagonist
• Rival
• Adversary
• Other side
• Challenger
• One from the other side
• Foe or competitor
• Competitor or adversary
• Adversary, antagonist
• Adversary, competitor
• Contestant you're matched against
• The one you're up against
• One's competitor
• 'Adversary, antagonist (8)'