LISBON, Portugal (AP) -- Konstantinos Mitroglou kept Benfica on track for an unprecedented fourth consecutive Portuguese league title with the winning goal in a 1-0 victory at Moreirense on Sunday.
The Greece striker headed in Luis ''Pizzi'' Afonso' free kick three minutes before halftime.
The victory restored the defending champion's one-point lead over FC Porto, which had moved to the top on Saturday after beating Belenenses 3-0.
Porto's victory was secured by goals from Danilo Pereira, Tiquinho Soares and Yacine Brahimi.
Also on Saturday, third-place Sporting Lisbon routed Boavista 4-0 thanks to Bas Dost's hat trick. Sporting remained eight points back.
There are six rounds left to decide the title. Benfica visits Sporting in two weeks' time in its toughest match remaining.