Ymer advanced to round two by beating German Daniel Altmaier 2-0 in sets.
But in the second round, Schwartzman became too tough. The Argentine won 2-0 in sets and the numbers were written at 7-5, 6-3.
Norwegian star Casper Ruud also went out in the second round. The Norwegian fell 1-2 in sets against Argentine Francisco Cerundolo.