Sporting Lisbon play host to Benfica in the Lisbon derby on Monday night.
Always a keenly fought affair, tonight's encounter offers Sporting and opportunity to put a sever dent in the title aspirations of their city rivals.
The Lions are on a high after qualifying for the Europa League semi-finals last week, however have a poor recent record against Jorge Jesus' side.
Sporting are likely to have a big say in who wins the league this season though, as they play all three championship candidates in the run in.
Benfica currently trail league leaders Porto by four points following Porto's 1-0 win over fellow title hopefuls Sporting Braga on Saturday night.
Should the Eagles overcome the challenge of Sporting, they then face tricky home game against high-flying Maritimo, followed by three eminently winnable fixtures.