Career
In 1928, at age 7008518400000000000♠16 years, 156 days, he became the youngest tennis player to ever represent the United States in the, and the youngest player to ever compete in a match, both records he still holds. Coen also competed at Wimbledon in 1928 and 29, twice reaching the third round. In The French Open he reach the fourth round in 1929 and 1930.
In United States Open he reach the fourth round in 1929.
Coen was mentored by Bill Tilden.