Santa Clara suffered a 4-game losing streak at home in all competitions.
Although they got back on winning track in the last round, the reference value of beating the bottom team is not great.
On the other hand, Rio Ave lost 2 games in a row, with mediocre form.
Both sides are without the winning factors.
However, the visitors are superior to the hosts in performance in the league this season.
Moreover, Rio Ave have once beaten Santa Clara on away field last season.
So Rio Ave are expected to keep unbeaten in this away game.