Opelka was something of a surprise winner in Maryland .
Opelka had an outstanding summer in reaching the USTA Boys 18s Clay Courts final and advancing to the round of 16 at the National Championships in Kalamazoo as a qualifier .
Opelka was something of a surprise winner in Maryland , although he had an outstanding summer in reaching the USTA Boys 18s Clay Courts final and advancing to the round of 16 at the National Championships in Kalamazoo as a qualifier .