Jamaica beats Panama 1-0 to advance to Gold Cup semifinals
Mattocks converted after Michael Murillo was whistled for a handball in the box in the first game of the doubleheader at Lincoln Financial Field. Mattocks, a forward for FC Cincinnati in Major League Soccer, had entered the game two minutes earlier.
Panama goalkeeper Luis Mejia had a good stop on Junior Flemmings in the 58th minute.
The Reggae Boyz have made it to the semifinal round in three straight Gold Cups.
Jamaica defender Damion Lowe will miss the semifinal after receiving a 90th-minute yellow card for time-wasting.