LISBON, Portugal — Striker Jackson Martinez scored in his 100th game with FC Porto to help earn a 1-1 draw at Guimaraes on Sunday and create a logjam at the top of the Portuguese league.
Jackson scored his fifth goal in four games for Porto this season in the 61st minute when he converted a penalty after Bruno Gaspar fouled Yacine Brahimi in the area.
But Jackson fouled Andre Andre in the box eight minutes later, letting Bernard Mensah level for Guimaraes with a spot kick of his own.
Both teams remained unbeaten through four rounds.
The draw left a four-way tie at the top of the league with the two sides level on points with Rio Ave and defending champions Benfica.
Guimaraes' goal was the first Porto has conceded this season.