優勝 and 賞品: winning and receiving a prize
Distinguish winning a competition from receiving a prize, without inferring victory from the item alone.
Winning the competition
優勝, read ゆうしょう, means winning a competition. 大会で優勝しました。 says that someone won the tournament.
優勝したいです。 expresses wanting to win. Do not change that wish into an achieved result.
The prize item
賞品, read しょうひん, means a prize item. 賞品を受け取りました。 means receiving a prize.
賞品は机の上にあります。 says that the prize is on the desk. The location does not identify its intended recipient.
Result and receipt
優勝しましたが、賞品はまだ届いていません。 says that the competition was won but the prize has not arrived yet. The result and delivery occur at different times.
参加者にも賞品がありました。 says that prizes were also available for participants. Receiving a prize alone does not establish winning.
Does 賞品を受け取りました necessarily mean winning the competition?
Show the answer and why
No. The conditions for receiving the prize need separate information.