After five rounds, two of Portugal's Big Three sides have now slipped slightly off the pace, and there's a new disruptor looking to shake things up in the top flight.

After five rounds, things have started to get a bit interesting in the Primeira Liga. For starters, two of Portugal's "Big Three" have fallen slightly behind the pace after dropping points recently. And now there's a new team trying to disrupt proceedings as they've managed to quietly sneak into the top three thanks to a string of good results.

Here's all you need to know ahead of the latest round of fixtures.

Primeira Liga standings heading into matchday six

Primeira Liga games you won't want to miss on matchday six

Porto vs Moreirense: Due to two draws from their last three games, Porto have seen themselves slip off the title pace. Fortunately, they'll have a chance to get back on track when they host Moreirense, who have yet to win a game so far this season and have picked up just three points from their opening five fixtures.

Estoril vs Sporting CP: The hosts have won just three of their last 20 meetings with Sporting CP (D6, L11) but as things stand, they're actually ahead of their upcoming opponents in the league table. Could this match present a potential banana peel for Sporting, who've dropped points from their last two games after a series of draws?

Benfica vs Boavista: As of now, Benfica remain the only team in the Primeira Liga who still have a perfect 100 per cent winning record. The Eagles now will look to pull further away from the chasing pack as they prepare to take on Boavista. However, the visitors have now improved their fortunes following an opening day loss and will come into this game having picked up eight points from their last four games.

Team news for matchday six

Here's who's in, in doubt, or suspended for matchday six.

Benfica: Adel Taarabt (Suspended)

Porto: Marchesín (Knee Injury)

Sporting CP: Pedro Gonçalves (Injured), Gonçalo Inácio (Injured)

Primeira Liga matchday three fixtures