Here is the list of games for this weekend, for the 3rd round:
MATCH DAY 3:
23.08 17:00
CD Nacional vs 
Sporting Clube de Portugal
23.08 19:30
FC Arouca vs 
Rio Ave FC
23.08 19:30
Sport Lisboa e Benfica vs 
CD Tondela
24.08 14:30
FC Famalicão vs 
Gil Vicente FC
24.08 17:00
FC Porto vs 
Casa Pia AC
24.08 19:30
Sporting Clube de Braga vs 
AVS
MATCH DAY 3:
23.08 17:00
CD Nacional vs Sporting Clube de Portugal23.08 19:30
FC Arouca vs Rio Ave FC23.08 19:30
Sport Lisboa e Benfica vs CD Tondela24.08 14:30
FC Famalicão vs Gil Vicente FC24.08 17:00
FC Porto vs Casa Pia AC24.08 19:30
Sporting Clube de Braga vs AVSSporting wins
Arouca or draw
Benfica wins
Famalicão or draw
Porto wins
Braga wins
These are very easy games with good odds, but since they're top teams against bottom teams, it's relatively easy to bet. But anything can happen at the start.
I only made a mistake in the Braga game; the rest of the time, I got everything right. And the most incredible thing is that Braga had five shots on goal and converted two of them. AVS had two shots on goal, and they scored on both. Impressive.