Primeira Liga Wrap: Jonas double powers Benfica
Benfica responded from a last-start Primeira Liga loss on Saturday, moving six points clear of Porto in the title race with a 3-1 win at home to Nacional.
Nacional sported an alternate formation against Jorge Jesus' men, opting to line up in a 4-4-2 instead of their usual 4-3-3 - but it did not stop the league leaders from striking early.
Maxi Pereira and Eduardo Salvio combined in the lead-up to Benfica's opener, scored by Jonas in the 21st minute.
Nicolas Gaitain and Eliseu were involved in producing Benfica's second, with Lima getting on the end of a cross on the half-hour mark as the champions looked ominous.
Jonas added his second in the 59th minute - lashing home from outside the area to find the top-right corner and put Benfica out of sight - before Nacional's Tiago Rodriguez stuck a consolation goal with 16 minutes to play.
Porto have a game in hand on Benfica, as they host Estoril on Monday - but the champions' bid for a 34th title in the Portuguese top flight strengthened with the victory, and saw them respond to their 2-1 loss to Rio Ave.
Third-placed Sporting Lisbon were held to a 1-1 draw at Pacos de Ferreira.
Islam Slimani's opener in the 30th minute for Marco Silva's European-placed outfit was cancelled out by Rodrigo Galo's goal with 15 minutes to play.
Get FourFourTwo Newsletter
The best features, fun and footballing quizzes, straight to your inbox every week.
Lisbon's winning streak came to a halt at three matches, but they remain seven points clear of Sporting Braga.
Penafiel were denied late in a 2-2 draw at home to Boavista, in a crushing result for the cellar-dwellers.
Needing victories to propel themselves out of the bottom two, Penafiel were on track when two goals in 15 second-half minutes saw them arrest a deficit.
Boavista had struck in the shadows of half-time via Carlos Santos, but Penafiel were level when Aaron Appindangoye got the final touch into his own net - and Joao Martins scored for the struggling hosts in the 67th minute.
However, Ze Manuel's injury-time equaliser left Penafiel five points from safety with seven matches to play.
Belenenses boosted their hopes of gaining a European spot with a 2-0 win at home to Moreirense.