Gregory Olesnycky and his grandfather Zenon Matkiwsky with their awards at the 2015 USTA National Grandfather/Grandson Grass Court Championship. FLORHAM PARK, N.J. – The grandfather-grandson duo of Zenon Matkiwsky and Greg (Hrits) Olesnycky won the 2015 USTA National Grandfather/Grandson Grass Court Championship in July 2015. Dr. Matkiwsky, 83, and Mr. Olesnycky, 21, won the 94th...