An opponent in a match or competition—the person or team on the other side in a contest.
明日の試合の対戦相手は昨年の優勝チームだ。
Tomorrow's opponent is last year's championship team.
チェス大会で強い対戦相手と当たってしまった。
I ended up facing a strong opponent at the chess tournament.
面接では対戦相手というより、自分をアピールする場だと考えてください。
In interviews, think of it less as facing an opponent and more as an opportunity to present yourself.
彼はライバルとの対戦相手として常に研究を重ねている。
He continually studies his rivals as opponents to prepare for matches.