Crossword clues for the word: ISNER The word ISNER has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for ISNER Showing 1 to 4 of 4 results Clue(s) John ---, 2010 Heineken Open singles tennis champion John —, winner of the Aukland Open singles tennis tournament in 2010 and 2014 John —, winner of the Heineken Open singles tennis tournament in 2010 and 2014 Tennis player John