This sportsman wears only red in the final round because he wants to look good in the pictures, in case he wins.

That sounds like something a confident and stylish athlete would do! Based on that clue - a sportsman who wears only red in the final round to look good in pictures - it could be referring to Tiger Woods, the famous golfer. Tiger Woods is well-known for wearing a red shirt during the final round of golf tournaments. He has said it gives him confidence and has become a signature look - and yes, it definitely looks great in victory photos.