AC Milan and Inter Milan secured matching 2-0 victories over Roman clubs as they briefly swopped places in Serie A ahead of their Champions League semi-final clash.
Milan briefly jumped from sixth to fourth, leapfrogging Inter, with a home victory over second-place Lazio in the early game.
"We played a great game. Now there is plenty of time to recover ahead of the semi-final against Inter," said Milan coach Stefano Pioli.
"Now let's think about the Champions League."
Inter then jumped back to fourth when they won away at Roma, keeping Jose Mourinho's team outside the European places.
Inter coach, Simone Inzaghi said the Champions League semi-final would be "a showdown played over 180 minutes."
"We know what we have to do," he added.
At the San Siro, Ismael Bennacer pounced on a loose ball in the Lazio area and thrashed his shot home to give AC Milan the lead in the 17th minute.
After 29 minutes, wingback Theo Hernandez collected a roll-out from goalkeeper Mike Maignan on the edge of the Milan box.
After shrugging off an early challenge the Frenchman ran unhindered deep into the Lazio half before thumping a dipping 30-metre shot past Ivan Provedel.
Lazio did not manage a shot on target, although Toma Basic scuffed a close-range chance in the dying seconds.
The two Milan clubs meet in the first leg of a Champions League semi-final on Wednesday and both seemed to have an eye on that match.
Milan withdrew Rafael Leao after 10 minutes. The winger indicated to the bench that he had a thigh problem and, after a discussion, was replaced.