Watch highlights of Benfica vs Nacional.
Benfica increased the gap to six points against second placed Porto, who have a game in hand, after an emphatic first half attacking performance. Jonas scored the first on the 21st minute in a move which started with Gaitán's superb tackle. Lima made it two with a cross from Gaitán and Jonas doubled his tally before the hour with a sweetly struck shot from outside the area, hitting the underneath of Gottardi's crossbar in the process.
Nacional were able to clinch one back with a long range effort by Tiago Rodrigues. There was not much Júlio César could have done in a game where he spent majority of his time watching the play.
Talisca was brought on in the second half to replace Jonas who is one booking away from a one-match suspension. Jorge Jesus was soon forced to substitute the Brazilian who dislocated his finger.
Benfica host Académica de Coimbra next on Saturday 11th April at 17:00 BST, in Estádio da Luz. Live coverage from BTV 1 HD.
Benfica 1 - 0, Jonas, 21m (assist by Salvio)
Benfica 2 - 0, Jonas, 30m (assist by Gaitán)
Benfica 3 - 0, Jonas, 59m (assist by Salvio)
Nacional 3 - 1, Tiago Rodrigues, 74m