Question: What surface did Smeets play on during the Kuwait tournament?
SQL: SELECT "Surface" FROM "2-15145771-3" WHERE "Tournament" = 'Kuwait';

Question: What tournament did Smeets play against Mark Nielsen?
SQL: SELECT "Tournament" FROM "2-15145771-3" WHERE "Opponent in the final" = 'Mark Nielsen';

Question: Who was the opponent during the tournament in Kuwait?
SQL: SELECT "Opponent in the final" FROM "2-15145771-3" WHERE "Tournament" = 'Kuwait';